Smart Wireless WiFi Ring Doorbell Video Camera Intercom Phone Home Security Features ANTI-THEFT ALARM FUNCTION : Anti-theft alarm function, when the outdoor unit leave the wall, the indoor unit will be issued an alarm. You will receive an alert and a recorded video clip whenever motion is detected. WIFI + RF WIRELESS CONNECT :Never off line, 2.4G Wifi + RF wireless transmission, always keep online. You can just sit on your couch or lie on your bed seeing and talking to the visitor in front of your door. EASY TO INSTALL NIGHT VISION HD WIDE WIDE-ANGLE: Wireless Camera DoorBell is Easy to install, can use the adhesive paste installation or screw fixation. Night Vision - Protect your home day and night with infrared night vision. Keep your home safe at night. HD wide-angle lens gives you a clear view of your entire space. Slide your finger over the live view screen to pan the video feed left or right CHEAK ANYWHERE ANYTIME : Visitor records, visitor snapshot and other information are stored in the cloud, user can check at anytime, anywhere. Press doorbell, it will automatically snapshot and push to the smartphone APP. NOTE: Please notice that the indoor unit and the outdoor unit should be paired, and Wifi should be connect with your router, and SSID of your Router can not includes special characters. Specifications Weight: 150g Power supply mode: The outdoor unit is powered by 2 AAA batteries (not included), and the indoor unit is plug power supply Product size: Outdoor unit: 8.7 * 5.8 * 1.5cm, indoor unit: 4.5 * 3.5 * 3.5cm