OhmKat Video Doorbell Power Supply - Compatible with Nest Hello

OhmKat Video Doorbell Power Supply - Compatible with Nest Hello

Regular price $34.99 Sale

OhmKat Video Doorbell Power Supplies make installation of video doorbells quick and easy for anyone. By eliminating the need for electric doorbell wires, OhmKat makes video doorbell technology realistic for every door on every home. As long as you have an outlet close to the door, you can install the OhmKat Video Doorbell Power Supply in minutes. All Power Supplies have been thoroughly tested for safety, full feature operation of the video doorbell and ease of installation. To maintain the warranty, only install the Power Supply intended for the particular model noted. OhmKat is not endorsed by or affiliated with Nest or its parent company.
  • Directly power your Nest Hello - installs in minutes - no need for an existing doorbell or new wiring
  • NEW - now featuring the ONE TOUCH POWER TEST™.  Test your power supply instantly.
  • Designed for easy split assembly through door hole and molding.
  • Professionally designed and tested to power the full functionality of your Nest Hello. All components are robustly engineered to provide years of trouble free operation
  • Install your doorbell on any door and plug directly into any outlet in your home. Add doorbells to your back door, side door or any door
  • Not compatible with any other models - electronically designed to work exclusively with the Nest Hello

All OhmKat products come with a Lifetime Replacement Warranty.  Buy with confidence. We guarantee it works as promised!


NOTE FOR UK AND EU BUYERS:  Due to changes in VAT collection standards, you will see increased shipping charges to all UK and EU addresses.  For a better overall price and faster shipping please shop for OhmKat products on your country's local Amazon website.

Customer Reviews

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  • Hello, Is there any reason that the plugin connections could not be removed and spliced to have one continuous wire? I need about 11 feet from the plug to the door bell and am trying to minimize the size of hole that I have to drill.

    No reason at all.  You can use your own 20 gauge doorbell wire.  We have had over 100 foot successful runs.

    We also offer a 12 and 24 ft extensions so that you can have a full 12 or 24 feet behind the wall and still have the split connection outside the wall.


  • It looks like your connector is going to require a larger hole be drilled because of the mid wire split/connection?

    It really depends on where and how you are threading it.  If the split connection needs to pass through the wall, a slightly larger hole is needed.  Most installation have the split connection on the inside (not behind the wall) with the wire running to the bell.

  • Can I get one of these with a longer cord? I am going to use my Nest Hello at my driveway gate, so using the available extension would not be the best way to go.

    We sell 24 foot extensions on our website that are very easy to install.  This will give you 30 total feet.  If you need a longer run you can purchase 20 gauge doorbell wire from a local hardware store.  We have had successful runs of over 100 feet.

  • I currently have 1 nest doorbell functioning perfectly. I need to install a 2nd unit on a side door. for some reason there is no power to the side door. it looks like I can use a 2nd separate transformer. There is a 2nd set of wires going to the chime, from the side door. would i just energize the side door bell and use the existing wires to the "Side door" chime? Thanks

    I am a little confused by your scenario.  Are you using our power supply on the front door, or traditional wiring? 

    The easiest thing to do is to purchase our power supply and chime, attach them to the Nest Hello on the side door, and plug it in to an outlet near the door.  This will allow you to have a fully functioning side door nest hello in about 10 minutes.  

    If you have additional questions, please do not hesitate to email at service@ohmkat.com or call at 732-876-3034

  • If i have a 20 gauge red and white doorbell wire run, I can extend that with your plug in transformer, correct? If I wanted to add 2 wireless chimes what else would I need in order to make that happen? Your quick response is appreciated.. Thanks a ton!

    Yes, you are corect.  You can splice directly to our wire and you are good to go.  The only hiccup would be if there is a crimp or a cut in your wire behind your wall, which sometimes can happen. 

    You would order two chime kits here: https://www.ohmkat.com/products/universal-wireless-video-doorbell-chime

    Once you get them, you will pair the second receiver with the first transmitter by plugging it in, pressing and holding the volume button, ringing the bell, and then releasing the volume button when the chime starts.  Both chimes should ring when you press the bell now.

  • Would this work with a Ring doorbell?

    We design these for specific bells, but good news!  we offer a version for all Ring models as well.

    Here is the link to the Ring PRO model:


  • Are there any issues running your cables behind drywall?

    Not at all.  Most of our installations are run behind drywall.  If you are a professional installer, please email me at brent@ohmkat.com to discuss our pro program.

  • Hi, I'm very interested in your product. Short question: Can I convince you to extend me to a 60 day return? Long story: This is for my work. I have already both 2 Nest with 2 Lanmu power adapters. They work great. I also bought 2 Google Home Minis to work as chimes. Except they don't work on our work WIFI network. IT dept. took so long to tell me it won't work that now I can't return the Google Home Minis. Not your problem, but I hesitate to ask my boss for another $150 (2 adapters and 2 chimes) if I can't return the items easily, if once again, I've overlooked some technicality. Hope that makes some sense.

    No problem! 

    We offer free easy returns and will be accept returns for 90 days at no charge and with free shipping.  We also offer a Lifetime Replacement Warranty so that if any of our products ever fail, we will replace them.

  • How long is the cable?

    The cable is 12 ft.  6 ft between the video doorbell and the split connection, and 6 ft between the split connection and the transformer. 

    We also sell 6 ft extensions that fit in the split connection for $9.99. 

    If you need additional length, you can extend the length using 20 gauge doorbell wire that you can purchase at a hardware store.

  • Do I need to use the chime connector that Nest provides? Nest says I need to use it

    Thanks for the question.  When you are using our power supplies, you do not need to use the chime connector.  The chime connector provides protection for the Nest Hello in situations with traditional doorbell transformers and chimes.  We built the protection directly into our power supply so no additional resistors, connectors or diodes are needed.  Just plug it in, set up the app and you are all set.