With a built-in rechargeable battery and simple installation, our redesigned Battery Doorbell 2K gives you the protection you need, where you need it. See every moment that happens at your front door in Retinal 2K video sent straight to your phone. | Ring | | Battery Doorbell 2K, Retinal 2K with wide-angle video, up to 6x Enhanced Zoom, Two-Way Talk, and Built-In Battery | Speckled Grey | Best Buy