[2.4GHZ Wi-Fi Connection Not 5GHZ] - Smart doorbell, just download the APP and connect to the phone with 2.4GHz Wifi,and our device can be connected Wifi even out of door or through few walls with reliable connection transmission and strong signal. Its compatible with iOS and Android.[Motion Detection&Night Vision] - Doorbell will send you the message when someone move in in front of the doorbell camera. Equipped with IR sensor and LED, it allows you to take photography and record videos at day or night. Keep your home safe at night.[Video Talk-Back & free cloud storage ]-You can watch and talk with visitors on mobile phones and tablets anytime and anywhere, and transmit video or voice more clearly through noise reduction and rate adaptive technology. free cloud storage with bank protection level.(7 days cyclic storage)[Simple installation method]-The smart doorbell supports two fixing methods: the first method is to use the matching double-sided tape to directly paste it on the wall. the second method is to use the matching screws to punch holes install;The smart doorbell supports two power supply methods: the first is to use the matching three 18650 batteries to directly supply power. The second method is to use AC 8 to 24V hard-wired power supply.[1 Year Warranty & Battery included] - Guaranteed after-sales service to assure your long-term enjoyment. If you have any question or don't know how to use this video doorbell,please do not hesitate to contact us. Include 3*18650 batteries. Video Doorbell Camera HD WiFi Doorbell Wireless Operated Motion Detector Audio & Speaker Night Vision for iOS&Android