Features:This doorbell works on 2.4GHz, allows 1 main and 8 shared accounts access to the doorbells(max 3 users online at the same time).With built-in speaker and mic for 2 way video calls, you can take with your visitors and see your visitors in 480P HD image.Built-in 2pcs 850nm lightless infrared lights with auto backlight compensation for clear night vision.The wireless doorbell has built-in 800mAh high-capacity battery, long working time with one charge.Supports Cloud storage, does not support TF card. Easy to install within minutes, no complicated tools needed.Specification:Main chip: XR872Memory: 32Mb flashSensor: 30W GC0328 CMOS SensorLens: 100° Wide Angle LensSensor function: Automatic white balance, Automatic gain control, Automatic backlight compensationSignal-to-noise ratio: >41dBMinimum illumination: 0.8Lux/F1.4 (color mode), 0.3Lux/F1.4 (black and white mode)Night vision: 2pcs 850nm infrared lightsNight vision distance: 3 metersVideo format: JPGVideo resolution/frame rate: 480P/7fpsRecording method: Button trigger recordingBuilt-in battery: 3.7V 800mAh polymer batteryWIFI connection: 2.4GHz wifi, 802.11 b/g/nNetwork protocol: TCP/IP/http/TCP/UDP/DHCP/DNS/DDNS/NTP/RTP/P2PChime: Support RF 433MHz chimeStorage: Cloud storage (Not support TF card), 3 days of free cloud storageStorage temperature: 0°C - 50°COperation temperature: -10°C - 50°CPackage Included:1x Smart video doorbell1x Chime