Brand new Resolution: 1280*720 Feild of Angle View: 166° IR LED: 6*850mm Wi-Fi: IEEE 802 11 b/g/n Audio: Two-way talk with noise cancellation Recording:Device SD card recording(20 seconds) Storage: 8G/16G/32G(not included) Battery: AC Input/2 x 18650 specification batteries(total 6800mAh, work regularly for 6 months.) (Not Included) Monitoring: Device Button, Motion Detection, Remote Live View Notifications: Push Notifications within 1 second Device Wakeup: Within 600 ms Power Consumption: Power Consumption Standby 200uA, Working 170mA This wifi doorbell can connect home WiFi and achieve a two way intercom between the doorbell and cell phone. When a visitor presses the doorbell sound is activated and the camera will start sending real time images and call to the cell phone. The user will receive the call and can check who the visitor is, can intercom with the visitor and remotely unlock the door.