The main parameters and specifications of the doorbell: 1. Master control: XR872 2. Memory: 32Mb flash 3. Sensor: 30W GC0328 CMOS sensor 4. Lens: 100 wide-angle lens Sensor performance: support automatic white balance, automatic gain control, automatic backlight compensation 5. Signal-to-noise ratio: 41dB 6. Minimum illumination: 0.8Lux/F1.4 (color mode), 0.3Lux/F1.4 (black and white mode) 7. Night vision: 2 pieces of 850nm28Mil high-power infrared lights Night vision distance: 1 meter is the best, the longest distance is 3 meters 8. Video format: JPG 9. Video size/frame rate: 480P/7fps 10. Recording method: 1. Press the button to trigger the recording 11. Cloud storage image: 5 seconds (5 images) 12. Battery type/capacity: Polymer 803035/800MAH Battery discharge time: Polymer battery dormant and standby for 1 year 13. Network protocol: TCP/IP/HTTP/TCP/UDP/DHCP/DNS/DDNS/NTP/RTP/P2P WIFI connection: 2.4GHz wifi, support (802.11 b/g/n) 14. Ding Dong: Support RF 433MHZ Ding Dong 15. Storage: Support cloud storage function (without TF card function), 3 days free cycle cloud storage" 16. Working voltage: Polymer 803035/3.7V 17. Working current: working current 219mA, deep sleep current 10mA, infrared working current 280mA 18. USB charging voltage: DC 5V / 1.5A 19. Storage temperature (): (050) 20. Operating temperature (C): -1050C, working humidity <95% Wake-up method: 1. Doorbell button to wake up, APP access doorbell rules: 1 main account + 8 shared accounts = 9 users can connect to the doorbell, only 3 users can preview the screen at the same time at a time, and only one user can talk to the doorbell at a time" Purpose: When guests come to visit, they can make video and voice calls and short-term video recordings. The host can know the information of the visitors without opening the door Features: wireless connection, ultra-low power consumption, can support multiple accounts to watch online at the same time