OhmKat is the safer, more reliable power supply. We created the video doorbell power supply, and we are still the market leader. With electronics inside that protect during short or doorbell malfunction, the OhmKat power supplies are superior, and every one comes equipped with self test capability. Our transformers are guaranteed to work with your video doorbells with no additional wiring, electronics, resistors or chime connectors necessary. Simply attach the included wire to your video doorbell and plug it in.
And as always, with our Lifetime Warranty, if it stops working we will replace it for free.