Feature: 1. High Definition: Built in high definition lens, horizontal view 120 degrees, diagonal view 150 degrees, provide you with clear images and crisp videos. 2. PIR Human Detection: Built in PIR sensor, can detect within a maximum range of 5 meters at the door for 24 hours. When human movement is detected, video is taken to protect the security of the home. 3. 2 Way o: Wireless doorbell camera has a built in high sensitivity microphone and high power speaker, and in any case, you can see and talk to visitor in real time. 4. Energy Saving: Built in lithium battery, low power consumption, more energy saving, the doorbell can be reverse charged by power bank and for Android phone via micro USB data line. 5. Simple Installation: Wireless connection, no complicated operation is required, convenient for using, safe and reliable, support for Tuya smart app. Specification: Item Type: Video Doorbell Material: ABS Color: Black Sensor: 1080P COMS sensor Lens: 6G wide angle 2.2mm lens Viewing Angle: Horizontal 120 degrees, diagonal 150 degrees Video Streaming: Main code stream 1280x720/15fps, sub code stream 640x360/15fps CMOS Performance: Support automatic white balance, automatic gain control, automatic backlight compensation System: Lite OS Standby Time: About 6 months (awakening 10pcs per , 30 seconds each time) Night Convert: Automatic switching of dual filters Infrared Distance: 850nm infrared, effective range of 5m/16.4ft Network Configuration Mode: Qr code distribution network, sound wave, wifi quick connection PIR Human Detection: Support PIR detection wake up o Coding Standard: AAC and G.726 o Input Output: -38dB microphone, built in 1 speaker Video Mode: Automatic video and event video Network: WiFi: 2.4GHz Network Protocol: TCP/IP, HTTP, TCP, UDP, SMTP, DHCP, DNS, P2P Wireless: WIFI802.11b/g/n wireless network Alarm: PIR human Detection: Support Function: Adaptive Streaming: Support 2 Way o: Supports full duplex real time calls Panoramic Display Mode: N/A Sleep Time: Adjustable for 15S, 30S and 60S Voice Call: Support Remote Wakening: Support PIR Wakening: Support APP: For Tuya smart System Requirement: Power Supply: 2x18650 Lithium battery 2200mAH (built in) Working Temperature: -10 to +50 Working Humidity: 80%RH Package List: 1 x Video Doorbell 1 x Ding Dong Machine 1 x USB Cable 1 x Screwdriver 4 x Screw 4 x Expansion Pipe 1 x Position Sticker 2 x User Manual Note: Do not place the product in an environment with excessive corrosion, humidity and high temperature.