This smart battery Wifi Video Doorbell lets you answer the door from anywhere, whether you are halfway across the world, or just too busy to walk to the door. It lets you see, hear and speak to visitors with ease using your smart phone or tablet. Features: HD720P images and 166 degree viewing angle, providing you with a clearer and broader perspective. Built-in USB line lithium battery,ultra low power, usable charging and power supply. 6 IR Leds, D / N modes are automatically switched by optical sensors, it can monitor and capture images in low illumination environment. PIR motion detection and anti tamper alarm function, it can automatically record or capture photoes and will send your alarm information to your phone if there is motion. Support mobile phone monitoring (iOS, Android). You can view the outside of the door,and you can make video and audio calls and record a short video when you find a visitor outside the door. Easy to install (no cables needed), just need Wifi connection. Cloud storage function to support maximum 32GB TF Card (save video recording). Fast access through applications (Automatic wake-up in 3 seconds), responding to user access requirements within one second. The latest IP65 design, no need to worry about bad weather. Specifications: Model: ED-400V Display Resolution: 1.0MP-1280x720P Focal Length: 1.7mm Perspective: 166 Degree Wide Angle Video Compression: H.264 Resolution: 1280 * 720 @ 25FPS Night Visibility: 6pcs IR-LEDS Alarm PIR Motion Detection: Support (If PIR is turned on, only 1200 times). Tamper Proofing Function: Support Network Protocol: TCP / IP, UDP, DHCP, P2P, RTSP, FTP ONVIF: No Wireless Standard: 2.4GHz WiFi IEEE 802.11b / g / n, App By Phone Android, iOS (app:wecsee) Memory Storage: Support, SD TF Card Maximum 32GB Cloud Function: Support Average Power Consumption: 170mA Standdby Mode: 200uA Working Temperature -20 ℃ to 55 ℃ Relative Humidity: 85%, no condensation. Size(L*W*H): 12.5*6.7*2.3 cm/4.9*2.6*0.9in Weight: 360g/12.7oz Package List: 1* Doorbell (Built in lithium battery) 1* User Manual 1* Installation Kit 1* Data Line 1、HD720P images and 166 degree viewing angle, providing you with a clearer and broader perspective. 2、Built-in USB line lithium battery,ultra low power, usable charging and power supply. 3、6 IR Leds, D / N modes are automatically switched by optical sensors, it can monitor and capture images in low illumination environment. 4、PIR motion detection and anti tamper alarm function, it can automatically record or capture photoes and will send your alarm information to your phone if there is motion. 5、Support mobile phone monitoring (iOS, Android). You can view the outside of the door,and you can make video and audio calls and record a short video when you find a visitor outside the door.