Corui Wireless Smart Video Doorbell Digital Visual Intercom WIFI Remote Home Alarm Door Bell Waterproof Security Camera Monitor Specifications Sensor: 720p GC1054 CMOS sensor Lens: 120 wide-angle lens Night vision: automatic switching of dual filters, 6 high-power infrared lights of 850nm28Mil Night vision distance: 5 meters is the best, the longest distance is 20 meters Motion detection: PIR motion detection, the sensitivity can be adjusted to detect the distance (triggered immediately within the effective distance), the best 2 meters, the longest 4 meters (affected by ambient temperature and light) Humanoid Recognition: It will automatically record when a humanoid is detected (if no humanoid is detected, it will automatically enter the sleep state) Video size/frame rate 720P/20fps Battery type/capacity: 18650 cells 2600mAH*2=5200mAH (battery not included) Battery discharge time: two 18650 batteries Sleep standby: 2 months, recording 30 15-second videos every day can last for 45 days WIFI connection: 2.4GHz wifi, support (802.11 b/g/n) Working voltage: 3.7V 18650 lithium battery Working current: working current 250mA (mA), sleep standby current 0.8mA (mA) USB charging voltage: DC 5V / 1.5A AC power supply/charging: External AC 12-24V Storage temperature (): 050 Operating temperature () Operating temperature: -1070 Working humidity: