Feature:1.Wireless Connection, App Control: WiFi connection enables you to remotely control the smart video doorbell via app.2.Video Call: When a visitor rings the doorbell, the app will soon send out a notification, and you can have video call with the visitor via app. Meanwhile, it will automatically capture 2 pictures, which you can check in your spare time.3.Voice Call: Beside video call, you can also choose real-time two-way audio, if you don't want to be seen. It also allows you to sound like an adult male in response to your unwelcome visitors.4.IR Night Vision: The IR light automatically turns on at night for excellent night vision. Even at night, you can clearly see the visitor outside the door.5.Free Cloud Storage Service: The doorbell supports free cloud storage service. Files in the cloud can be saved for 3 days. After 3 days, files will be automatically covered by new videos or pictures.6.Long Battery Life: has a built-in 800mAh rechargeable lithium battery, which can work for over 6 months after fully charged for 2 hours. No need of battery replacement.7.Easy Installation: The small doorbell is easy to mount. Stick the provided 3M glue onto the wall, and then fix the doorbell on the glue. No wiring or drilling needed. Drilling is also viable.8.Ding-dong Machine with 38 Ringtones: The video doorbell comes with a ding-dong machine, which is installed indoors. Ding-dong machine allows you to adjust volume and choose from 38 ringtones.Specification:Type: WiFi Video DoorbellColor: WhiteConnection Type: WirelessPower Supply: Built-in 800mAh Lithium Battery Size of Doorbell: 73 x 46 x 25 mmSize of Ding-dong Machine: 43 x 41 x 32 mmLens Angle: 60S/N Ratio: 41dBSensor: 30W GC0328 CMOSMinimum Illumination: 0.3Lux/F1.4Night Vision Distance: 1-3 meters Video Size/Frame Rate: 30W/7fps WiFi: 2.4GHz WiFi 802.11 b/g/nWork Temperature: -1050Work Humidity: