1、With the recording function, you can play back historical records at any time through the APP, or you can actively wake up through your mobile phone to intelligently push suspicious videos. 2、PIR wake up design, it has a built in human body sensor (PIR), which can perceive the dynamics in front of the door in real time, record video, and can also push intelligently. 3、Simple installation, it does not need wiring, it can be easily installed only by following the steps of the manual, without cumbersome worries, allowing you to enjoy a comfortable and safe life. 4、Using low power consumption technology, it can be used effectively for more than 8 months, the pool can be recharged, simple energy saving, environmental protection and convenient. 5、Video design is available, it can make video calls with guests, and record for a short time, and it can also connect multiple users with wireless WIFI to watch online at the same time. 1 x Doorbell (Battery Not Included)1 x Base1 x Double Sided Tape5 x Screw4 x Screw Tube1 x Hex Wrench1 x Manual Item Type: DoorbellColor: WhiteChip: 8715Image Sensor: 1/ 2.7 InchFunction: Progressive Scan CMOS Sensor Lens, Night Vision Dual Filter Automatic Switching, IR Control, Video Function, Mobile Phone Push, Motion Detection, Wide Angle Viewing Angle, Intercom FunctionViewing Angle: 26mm At F20/155Infrared Light: 4x850mm High Power Infrared LightNight Vision: Approx. 10m / 32.8ftMaterial: ABSWeight: Approx. 185g / 6.5ozVideo Encoding: 720P, 15FPS+720P, 24FPS+VGA, 30FPS+QVGA, 30FPS+720P at 1FSJPEGResolution: 720PMaximum Frame Rate: 15FPS (720P)Network Protocol: TCP/IP, HTTP, TCP, UDP, SMTP, FTP, DHCP, DNS, DDNS, NTP, UPnP, P2P, Zoom.Wireless Network: 80211B/G/NStorage Memory Card: Maximum Support 32GPower Supply Mode: 2x18650 Battery (Battery Not Included)Wide Angle: 120°