Arlo - Smart Wi-Fi Video Doorbell (2nd Generation) - Wired/Battery Operated with 1080p Resolution - WhiteProtect your front door with clear 1080p HD resolution. Designed with an optimized viewing angle, you can see a person from head to toe or a package on the ground. When motion is detected, you will receive notifications and be able to stream live video from your smart device. With 2 Way Audio, you can speak to visitors right from your phone or use pre recorded quick reply messages. To ward off intruders, you can trigger the Integrated Siren