The must have item for your home this day and age! See who's come knocking with this WiFi security doorbell. If you're out of the house or unable to walk to the door, check and speak to the visitor with the simple mobile app. Features: Have smart mobile monitoring and IR night motion. Support mobile phone remote fast wake-up device. Features night vision, 720p picture resolution, and a picture and video recording function. See who's at the door from your smartphone (Android and iOS compatible)! Requires 2.4GHz bandwidth WiFi. Requires 18650 lithium batteries (can be charged by USB line) Two batteries can be used, continuous power supply 4-5 months; Three batteries can use longer time, about half a year. Installation Tips: 1. Not fully waterproof, please install it in undercover area. 2. The Wireless Video Doorbell supports WIFI 2.4GHz, DOES NOT support WIFI 5GHz. 3. Please ensure to remove the green coloured battery insulation stickers before charging device. Specifications: Video Resolution:720p HD Power Source: 18650 lithium batteries 3*2600mAh Field of View:166o Dimensions:14.4*3.23*7.45cm Wi-Fi Connectivity:2.4 GHz Memory card: Up to 32GB (Memory card is not included) Infrared motion detection: yes Colour: black Package List: 3 x Batteries 1 x Doorbell 1 x Wrench tool 1 x Set mounting screws 4 x Installing plastic plugs 1 x Instruction manual