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. OhmKat power supplies are the only ones intelligently engineered to protect your video doorbells at all times and give you peace of mind. OhmKat invented the Video Doorbell Power Supply. Other products are imitations, and do not provide the protection your doorbell needs through all its operating conditions and edge cases. All OhmKat 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.