18V 500mA Transformer for Ring Nest Eufy Wyze Arlo Video Doorbell
4.5Editor score
Plug-in design requires no hardwiring
Delivers stable 18V 500mA power
Compatible with most major video doorbell brands
In this guide
Video doorbells have revolutionized home security by allowing you to see who is at your door from anywhere. However, many models rely on batteries that require frequent charging or replacement, which can be inconvenient. A hardwired transformer provides continuous power, ensuring your device stays online and ready to capture every visitor without interruption.
Choosing the right transformer is crucial because not all power supplies are created equal. Your doorbell needs a specific voltage and amperage to function correctly, and using the wrong one can damage the device. We have carefully selected ten top-rated transformers that meet the power requirements of popular brands like Ring, Nest, and Arlo.
Each pick in this list highlights a unique solution, whether you need a simple plug-in adapter or a hardwired unit for permanent installation. We evaluate compatibility, safety features, cable length, and overall reliability to help you make an informed decision. Keep in mind that prices and availability may change, so check the current details before purchasing.
Top 3 Picks for Best Hardwired Transformer for Ring Nest Arlo Video Doorbell
Hardwired Transformer for Ring Wired Video Doorbells
4.4Editor score
Optimizes performance for Pro models
Easily replaces most North American transformers
Includes all tools needed for easy installation
24V AC Doorbell Transformer, 18ft C Wire Adapter for Ring Nest Eufy
4.5Editor score
Extra-long 18-foot heavy-duty cable
Includes mounting clips for clean installation
Fire-resistant casing with thermal protection
Top 10 Best Hardwired Transformer for Ring Nest Arlo Video Doorbell in 2026 Compared
This comparison table provides a side-by-side look at all ten transformers we reviewed. It highlights key specifications and features to help you quickly identify which model best fits your specific doorbell setup and installation preferences.
ProductsSpecificationsEditor scorePrice
Best Budget
18V 500mA Transformer for Ring Nest Eufy Wyze Arlo Video Doorbell
Output: 18V 500mA
Plug-in adapter design
26FT white cable included
Compatible with Ring Nest Arlo
4.5Editor score
Editor's Choice
Hardwired Transformer for Ring Wired Video Doorbells
Output: 16V 30VA
Hardwired installation required
Includes installation tools
Replaces North American transformers
4.4Editor score
Best Premium
26ft 24V 500mA Doorbell Transformer Compatible with All Ring Versions
Output: 24V 500mA
26ft cable length
UL Certified safety
Works with thermostats
4.5Editor score
Auspow Doorbell Transformer 24V 40VA for Ring Video Doorbells
Output: 24V 40VA
Input: 120V AC
Universal compatibility
Easy screw installation
4.4Editor score
Newhouse Hardware 24V 40VA Door Bell Transformer Compatible with Ring
Output: 24V 40VA
Threaded hub mount
Multiple device support
Outdoor safe mounting
4.2Editor score
Video doorbell Hardwired Power Transformer, 18V500MA Hardwired Power Adapter
Output: 18V 500mA
196in cable included
Upgrade design for noise
Simple wall assembly
4.5Editor score
24V AC Doorbell Transformer, 18ft C Wire Adapter for Ring Nest Eufy
Output: 24V 500mA
18ft heavy-duty cable
Mounting clips included
Fire-resistant casing
4.5Editor score
24V 40VA Hardwired Doorbell Transformer for Ring, Nest & Smart Thermostats
Output: 24V 40VA
Hardwired replacement
Supports continuous power
Heat-resistant housing
4.6Editor score
VIIVRIA 24V 40VA Doorbell Transformer for Ring Pro/2 & Nest Hello
Output: 24V 40VA
Copper-core design
Dual-input terminals
Robust construction
4.3Editor score
AC-AC 24V Video Doorbell Power Supply Transformer
Output: 24V 600mA
Compact ribbed housing
Extended power cable
Simple plug-and-use
4.5Editor score
1. 18V 500mA Transformer – Best Overall Budget Option
18V 500mA Transformer for Ring Nest Eufy Wyze Arlo Video Doorbell
18V 500mA output
26FT white cable
Plug-in design
PC fireproof housing
This transformer offers an excellent entry point for homeowners who want to hardwire their video doorbell without complex electrical work. With a solid 4.5-star rating, users appreciate its ability to deliver stable power that keeps devices running 24/7. The 18V 500mA output is ideal for many popular models including Ring, Nest, and Arlo.
Pros
- No drilling or hardwiring required
- Eliminates low battery warnings
- Built-in protection circuits
- Compatible with multiple brands
- Eliminates transformer hum
Cons
- Requires standard outlet access
- Visible cable routing
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The plug-in design is the standout feature, allowing you to avoid drilling holes or running wires through walls. It includes a 26-foot white cable that gives you flexibility in positioning the outlet adapter. The housing is made of fire-resistant PC material, and it features copper plugs for a solid connection that resists daily wear and heat.
While it requires access to a standard outlet, which might limit placement options compared to hardwired units, the convenience factor is significant. The built-in protection circuits guard against overvoltage and short circuits, ensuring safety. The upgraded design also eliminates the humming noise often associated with cheaper transformers.
If you need a reliable power solution that avoids batteries but you are not ready for a full electrical installation, this is the top recommendation. It is best for those who want a quick setup to eliminate charging hassles while maintaining compatibility with most major video doorbell brands.
Plug and Play Convenience
Simply plug into any standard outlet and connect the wires to your doorbell for immediate power without tools.
Reliable Safety Features
Built-in circuits protect your device from voltage spikes and overheating to ensure long-term operation.
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2. Hardwired Transformer for Ring – Editor's Choice
Hardwired Transformer for Ring Wired Video Doorbells
16V 30VA output
Hardwired installation
Includes tools
Standard North American fit
This unit is specifically designed to optimize the performance of Ring video doorbell wired models, including the Pro and Pro 2 versions. With a 4.4-star rating, it addresses common power issues by providing increased power compared to underpowered original transformers. It is an excellent choice for those looking to upgrade an existing wired setup.
Pros
- Optimizes performance for Pro models
- Includes installation tools
- Easy replacement process
- Increases power output
- Fits standard boxes
Cons
- Requires electrical knowledge
- Hardwired only
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The package comes with all the tools needed for a easy installation, which is a rare and helpful inclusion. It replaces most North American doorbell transformers, making it a versatile solution for standard home wiring. The focus on optimizing performance ensures your doorbell can handle video streaming and two-way audio without dropping connection.
The main trade-off is that it requires hardwired installation, which means you need to turn off power at the breaker and connect wires directly. This might be challenging for those without electrical experience. However, if you already have a transformer box, this makes the swap straightforward and effective.
We recommend this for homeowners with Ring Pro models who are experiencing power issues or frequent resets. It provides a dedicated power source that ensures your device performs at its peak potential without relying on battery charges.
Performance Optimization
Specifically tuned to increase power for Ring Pro models to prevent performance drops during video streaming.
Complete Installation Kit
Includes the necessary tools to make replacing your old transformer quick and hassle-free.
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3. 24V AC Doorbell Transformer – Premium Feature Set
24V AC Doorbell Transformer, 18ft C Wire Adapter for Ring Nest Eufy
24V 500mA output
18ft heavy-duty cable
Mounting clips included
Fire-resistant casing
This transformer stands out with its premium build quality and comprehensive feature set. It delivers a steady 24V AC output that eliminates low-power warnings common in battery-operated setups. With a 4.5-star rating, it is highly regarded for its reliability and safety features in protecting your smart home devices.
Pros
- Extra-long 18ft cable
- Includes mounting clips
- Eliminates low-power warnings
- Fire-resistant and durable
- C-Wire solution for thermostats
Cons
- Higher price point
- Cable management needed
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The extra-long 18-foot heavy-duty cable allows you to route power from indoor outlets to your outdoor doorbell with ease. It also includes mounting clips for a clean installation that looks professional without dangling wires. The fire-resistant casing and thermal protection ensure safe operation even during heavy use.
While it may cost more than basic adapters, the added durability and cable length provide significant value. It serves as a dedicated C-Wire power source for thermostats as well, solving common HVAC wiring issues. The setup is hassle-free and does not require existing doorbell wiring.
This is the best choice for users who want a high-quality, durable solution that offers flexibility in placement. It is ideal for large homes where the outlet might be far from the door or for those who also need to power a thermostat.
Long Range Cable
The 18-foot cable provides flexibility to connect to outlets that are far from your doorbell location.
Safety and Durability
Constructed with fire-resistant materials to ensure safe operation during all weather conditions.
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4. 26ft 24V 500mA Doorbell Transformer – Wide Compatibility
26ft 24V 500mA Doorbell Transformer Compatible with All Ring Versions
24V 500mA output
26ft cable length
UL Certified safety
Multi-device support
This transformer offers an extensive 26-foot cable that gives you maximum flexibility in positioning your power source. It is UL certified, which adds a layer of trust regarding safety and quality. The 4.5-star rating reflects its ability to keep devices powered without interruption, even when located far away.
Pros
- Extremely long cable
- Compatible with many brands
- Certified safety standards
- Easy to install
- Works with thermostats
Cons
- Cable may need cutting
- Plug-in style
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It is compatible with a wide array of doorbells and thermostats, making it a versatile choice for mixed smart home ecosystems. You can connect it to Ring Nest Nest, Arlo, and even HVAC systems that need 24V power. The installation is straightforward, requiring no distinction between positive and negative wires.
The long cable is both a pro and a con; while it offers reach, you may need to cut it if excess length is undesirable. The adapter can be placed in a socket far from the doorbell to keep cables tidy. Support is available online to assist with any setup questions.
We recommend this for larger properties where the power source is not near the entrance. Its versatility with thermostats also makes it a great all-in-one power solution for your smart home setup.
Versatile Connectivity
Supports a wide range of devices from doorbells to thermostats for a unified power solution.
Safety Certification
UL Certification ensures the transformer meets high safety standards for home electrical use.
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5. Auspow Doorbell Transformer – Power Multiple Devices
Auspow Doorbell Transformer 24V 40VA for Ring Video Doorbells
24V 40VA output
120V AC input
Universal compatibility
Screw installation
This transformer delivers a robust 24V 40VA output, which is enough to power multiple devices simultaneously. It is an excellent replacement for old or underpowered transformers in your home. With a 4.4-star rating, it is trusted by users for maintaining reliable performance across Ring, Nest, and Eufy doorbells.
Pros
- 40VA power output
- Supports multiple devices
- Universal compatibility
- Easy to install
- Customer service support
Cons
- Requires hardwired setup
- Standard installation only
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The universal compatibility extends to thermostats like Ecobee and Honeywell, making it a smart upgrade for whole-home power. It fits most electrical boxes and can be installed with simple screws or clips. The design ensures that your doorbell and chime receive constant power without voltage drops.
Installation requires connecting to existing wiring, which may necessitate an electrician if you are uncomfortable with electrical work. However, the secure mounting options ensure the unit stays safe in place. Customer service is responsive if you encounter any issues with the product.
We suggest this for households that need to power both a doorbell and a thermostat. Its 40VA capacity ensures you have enough power to run everything smoothly without overloading the transformer.
High Power Capacity
The 40VA rating ensures enough power to run multiple devices without performance drops.
Reliable Support
Customer service is available to help resolve any issues to ensure you get a refund or replacement.
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6. Newhouse Hardware 24V 40VA Transformer – High Demand Ready
Newhouse Hardware 24V 40VA Door Bell Transformer Compatible with Ring
24V 40VA output
Threaded hub mount
Multi-purpose use
Outdoor safe
This transformer is engineered for high-demand smart homes with multiple connected devices. It provides a reliable 24V 40VA output that supports Ring doorbells and wired chimes effectively. The 4.2-star rating indicates solid performance for users who need a future-proof solution for their smart home systems.
Pros
- Built for high demand
- Threaded hub mounting
- Supports multiple devices
- Fits junction box
- Durable construction
Cons
- Not for wall installation
- Requires ventilation
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The built-in threaded hub allows for direct mounting to a standard junction box, ensuring a professional and secure installation. It is designed to be mounted outdoors in safe places, but care must be taken to provide proper ventilation to prevent overheating. This makes it suitable for busy households.
The main trade-off is that it generates heat, so it should not be installed inside a wall without space for dissipation. This requires careful planning during installation to ensure safety. However, the durable design supports modern home improvement needs across several indoor electrical devices.
We recommend this for users who need a powerful transformer for both doorbells and thermostats. It is a smart choice for those who want to upgrade their setup to handle high power demand without overloading the system.
Junction Box Mounting
Threaded hub allows for secure direct mounting to a standard electrical junction box.
Smart Home Ready
Compatible with Ring and Nest devices to ensure reliable uninterrupted power.
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7. Video Doorbell Hardwired Power Transformer – Quiet Operation
Video doorbell Hardwired Power Transformer, 18V500MA Hardwired Power Adapter
18V 500mA output
196in cable
Noise reduction design
Simple wall assembly
This transformer addresses a common issue with cheaper models: noise. The upgrade design solves the humming noise problem, ensuring your doorbell operates quietly. With a 4.5-star rating, it delivers stable 18V 500mA output that keeps visual doorbells working perfectly without interruptions.
Pros
- Solves noise problem
- Long cable included
- Easy wall assembly
- Stable output
- Customer support
Cons
- Assembly along wall needed
- No special tools
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It comes with a 196-inch cable that allows you to run power from an outlet to the doorbell along the wall. The assembly is simple and can be set up in minutes without special tools. You do not need to remove the original battery, making it a convenient retrofit option.
The lack of existing wiring requirements makes it a flexible solution for homes without hardwired setups. The professional design team has focused on consumer troubles, and support is available to help you troubleshoot any issues during use. It is a cost-effective way to keep devices charged.
We suggest this for users who want a quiet power solution without major renovations. The long cable provides enough reach to connect to nearby outlets while keeping installation simple and efficient.
Quiet Performance
The upgraded design eliminates humming noise for a more pleasant home experience.
Simple Setup
Assemble along the wall with provided cable for a quick installation in minutes.
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8. 24V 40VA Hardwired Doorbell Transformer – Fast Replacement
24V 40VA Hardwired Doorbell Transformer for Ring, Nest & Smart Thermostats
24V 40VA output
Hardwired installation
Secure terminal connections
Heat-resistant housing
This transformer is designed to fix power issues by providing stable 24V AC 40VA power to smart devices. It is an ideal replacement for underpowered units that cause low voltage warnings. With a 4.6-star rating, it is highly rated for its ability to keep doorbells and thermostats running smoothly.
Pros
- Fixes power issues
- Easy replacement
- Durable components
- Supports continuous power
- Heat-resistant housing
Cons
- Hardwired only
- Not for battery devices
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The installation is straightforward for existing doorbell wiring, making it simple for DIY users. It mounts securely to electrical boxes for flexible placement. The durable internal components and heat-resistant housing ensure long-term reliability in daily use.
It is not compatible with battery-only devices, so you must ensure your setup requires a hardwired connection. The focus on continuous power helps reduce charging interruptions and weak chimes. This makes it a practical upgrade for wired homes.
We recommend this for users who want to eliminate power warnings and improve system reliability. It works well with existing wiring setups to provide a stable foundation for your smart home devices.
Power Stability
Reduces low voltage warnings and unexpected disconnects with stable output power.
Easy Installation
Designed for fast replacement using most existing doorbell wiring setups.
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9. VIIVRIA 24V 40VA Doorbell Transformer – Copper Core Quality
VIIVRIA 24V 40VA Doorbell Transformer for Ring Pro/2 & Nest Hello
24V 40VA output
Copper-core design
Dual-input terminals
Heavy-duty construction
This transformer features a copper-core design that maintains stable voltage output even under full load. It is certified for Ring Pro/2 and Nest Hello, ensuring reliable operation for these high-demand models. The 4.3-star rating reflects its effectiveness in powering smart home devices consistently.
Pros
- Stable voltage output
- Heavy-duty build
- Supports multiple devices
- Easy installation process
- Certified compatibility
Cons
- Requires hardwiring
- Standard mount only
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The heavy-duty construction includes dual-input terminals for thermostats and chime integration. It supports multiple devices simultaneously, making it a versatile upgrade. The installation process is easy, using screws or clips to mount securely to the electrical box.
The design ensures a consistent supply for thermostats and doorbells. While it requires hardwiring, the build quality ensures reliable long-term performance. It is a solid choice for those looking to improve stability in their existing systems.
We suggest this for users needing stable voltage for Ring Pro or Nest Hello devices. Its dual-input capability allows for expanded functionality in your smart home wiring.
Copper Core Design
Copper-core design maintains stable output even under full load for better reliability.
Dual Input Support
Dual-input terminals allow for connecting both doorbells and thermostats simultaneously.
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10. AC-AC 24V Video Doorbell Power Supply Transformer – Compact Design
AC-AC 24V Video Doorbell Power Supply Transformer
24V 600mA output
Compact ribbed housing
Extended power cable
Simple plug-and-use
This transformer features a compact design that saves space while delivering 24V 600mA output. The ribbed housing improves heat dissipation for durability. With a 4.5-star rating, it is reliable for compatible devices and lighting systems that need steady power.
Pros
- Space-saving compact design
- 600mA power output
- Extended power cable
- Plug-and-use installation
- Ribbed housing
Cons
- Plug-in only
- Visible cable
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The extended power cable offers flexible placement options for installation. It is simple to use with stripped wire ends for direct connection to devices. The white adapter blends well in home settings. It works with Ring, Nest, and Arlo doorbells requiring 24V power.
The 600mA current draw support ensures stable operation even under heavy load. While it is a plug-in style, the cable length allows for practical routing. It is a straightforward solution for quick power needs.
We recommend this for users needing a compact plug-and-play power source. It is ideal for those who want to avoid complex wiring while ensuring their doorbell has enough power to function.
Space Saving Design
Compact white adapter with ribbed housing for improved heat dissipation.
Flexible Placement
Includes an extended power cable for flexible placement and installation options.
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Buying Guide – How to Choose the Best Hardwired Transformer for Ring Nest Arlo Video Doorbell
Selecting the right transformer is critical for the performance and longevity of your video doorbell. We have compiled essential factors to help you navigate the options available in the market today.
Voltage and Amperage
Your doorbell requires specific electrical input to function correctly. Most models need 16V to 24V with varying amperage such as 30VA or 40VA. Check your device label to ensure the transformer matches these requirements. Using a mismatched voltage can damage the internal electronics or lead to unstable operation.
Always confirm the voltage and amperage rating on your device before purchasing to ensure compatibility and safety.
Hardwired vs Plug-in
Decide whether you want a permanent hardwired solution or a plug-in adapter. Hardwired units replace existing transformers in your electrical box for a cleaner look but require wiring skills. Plug-in adapters are easier to set up without tools but may leave visible cables.
Choose hardwired for a professional look or plug-in for easier DIY installation without electrical work.
Cable Length
The length of the power cable determines where you can place the power source. Longer cables allow you to run wires from distant outlets to the doorbell without cutting. Ensure the length suits your home layout to avoid excessive tension on wires.
Select a cable length that comfortably reaches from your outlet to the doorbell without cutting.
Certifications
Look for safety certifications like UL to ensure the transformer meets electrical safety standards. Certified units reduce risks of overheating or electrical hazards. This is especially important for devices mounted near walls or outdoor areas.
Prioritize transformers with safety certifications to ensure reliable and safe operation in your home.
Heat Dissipation
Transformers generate heat during operation so ventilation is crucial to prevent overheating. Units with ribbed housing or open designs dissipate heat better than sealed plastic cases. Avoid placing transformers in enclosed spaces without airflow.
Ensure your transformer has adequate cooling features and ventilation space for safe operation.
Noise Levels
Some cheaper transformers produce a humming noise that can be annoying when indoors. Look for units designed to eliminate noise or those with shielding to reduce vibration. A quiet operation ensures your environment remains peaceful.
Choose noise-reduced models to avoid audible hums near your living or entrance areas.
Multiple Device Support
If you have multiple devices like thermostats and doorbells, ensure the transformer has enough power capacity. Higher VA ratings support multiple loads without dropping voltage. This prevents interruptions for all connected smart devices.
Verify the VA rating supports all your connected devices to avoid power failures for any of them.
Brand Reputation
Choose brands with a history of reliability and good customer support. Established brands often provide warranties and responsive help for technical issues. This can save you time and money if you encounter problems.
Stick with reputable brands that offer support and warranties for long-term peace of mind.
How to Use and Care for Your Hardwired Transformer for Ring Nest Arlo Video Doorbell
For plug-in transformers, simply plug the adapter into a standard outlet and connect the wires to your doorbell terminals. For hardwired units, turn off power at the breaker before connecting wires to the terminal block.
Ensure all connections are tight to prevent loose wires that can cause flickering or power loss. Use wire nuts or terminal screws provided with the transformer to secure the ends properly.
Regularly check the transformer for signs of overheating or damage. If you notice unusual smells or heat, disconnect it immediately and consult a professional electrician for inspection.
Frequently Asked Questions
Do I need a transformer for all video doorbells?
Not all video doorbells require a transformer, especially those that are battery-powered. However, hardwired models need a transformer to provide continuous power. If you want to avoid battery charging, you will need to install a compatible transformer.
What happens if I use the wrong voltage?
Using the wrong voltage can damage your doorbell's internal components or lead to unstable performance. Always check your device label to ensure the transformer output matches the required voltage and amperage exactly to avoid any issues.
Can I use a plug-in adapter instead of hardwiring?
Yes, many modern transformers offer plug-in adapters that simplify installation without drilling or rewiring. These are perfect if you lack electrical skills or want a temporary power solution for your video doorbell.
How do I know if my transformer is underpowered?
Signs include frequent battery warnings, video lag, or the doorbell disconnecting often. If your current transformer cannot provide enough amperage, upgrading to a higher VA unit should resolve these power issues.
Are hardwired transformers safe to install?
Yes, they are safe when installed correctly following electrical codes. Always turn off the circuit breaker before working on wiring and ensure connections are secure to prevent any electrical hazards or short circuits.
Can one transformer power multiple devices?
Yes, if the transformer has sufficient VA output to handle the combined load of your devices. Higher capacity transformers can support both a video doorbell and a smart thermostat without performance drops.
Why does my transformer make noise?
Noise is often caused by vibrations inside low-quality transformers or poor housing design. Upgrade to a model specifically designed to minimize hum and ensure the unit is securely mounted to reduce movement.
Do I need to remove the battery when using a transformer?
It depends on the model. Some systems require battery removal to prevent conflicts while others work alongside it. Check your user manual to ensure you follow the correct setup for your specific device type.
Final Thoughts on Choosing the Best Hardwired Transformer for Ring Nest Arlo Video Doorbell
We reviewed ten top-rated transformers that offer reliable power solutions for Ring, Nest, and Arlo doorbells. Our top picks range from budget-friendly plug-in adapters to robust hardwired units designed for multi-device setups.
Prioritize voltage compatibility and safety certifications when making your choice. Ensure the unit meets your specific power needs to avoid interruptions or potential damage to your smart home devices.
Prices and availability can change so check the current offers on our linked pages before purchasing. Taking time to match the right transformer ensures your video doorbell stays connected and ready to protect your home.