Function: 1. Clear display: 4,3 inch TFT LCD screen, full metal housing, CMOS sensor, full 1MP HD glass lens, supports multiple video formats up to 1280x720P. 2. PIR human motion detection: When someone approaches the door at a distance of 1-2 meters for about 2 seconds, the camera image will be automatically saved. 3. Night vision: 4 pieces of 850nm infrared lamps, 1‑2m infrared range. It can clearly record the image behind the door, even in dark environments. 4. Adjustable Ringtones: Built-in 4 ringtones and 3 levels of volume control; IP55 waterproof rating, can be used even on rainy days outdoors. 5. EEPROM data storage mode: no saved data will be lost after power failure, and maximum support for 32G fast memory 6. Power supply: with DC3.7V 1800MAH lithium battery, low power consumption and long standby time; it can also be charged via USB data cable. Specification: Material: ABS, Zinc Alloy Display: 4,3 inch Image sensor: 1/4 inch CMOS Effective pixels: 1280 (horizontal) x 720 (vertical) Minimum illumination: 0,5 lux/F2,0 in colour), 0,02 lux/F2,0 (black and white) White Balance: Automatic White Balance Tracking Gain Control: Automatic Signal-to-noise ratio: > 50dB Backlight Compensation: On WDR: Yes Electronic shutter: 1/4-1/10 000 s Day/night mode: color filter on black Focal length: 2,4 mm Horizontal viewing angle: 140 Numer: F2.0 Infrared night vision lights: 4 pieces, 3 mm, flat head, 90, 850 nm lights IR Automatic shutdown: off, 10s, 20s, 30s Languages: 6 (Chinese, English, French, German, Italian, Russian) Motion Detection: Support Display Settings: On. /Off Recording time: 10s, 20s, 30s Number of photos: one, two, three Format: support memory card format Light Source Frequency: 50HZ/60HZ Turn off memory: support Default setting: Support Doorbell Settings: Built-in 4 Ringtones Volume setting: 3 volume levels optional Main layout: JR Infrared Human Body Sensor: PIR Sensor PIR detection mode: Fresnel lens 9,5 mm LCD Screen Type: 4.3 LCD screen resolution: 480 x 272 Memory card: maximum 32G support Maximum image size: 1280 x 720 Number of frames per second: 50 Hz: 25 frames (1280 x 720 P) Video Compression: MJPEG Sound compression: G.711/16 kb/s Standby Current: 80UA Operating temperature: -30 -65 (outdoor) / -10 -50 (indoor) Operating Humidity: Protection Class: IP55 Installation Method: Screw Plate Suitable door: approx. 40-110mm/1.58-4.33in Suitable opening in the door: approx. 15-50mm/0.59-1.97in Battery: 1 1800 mAh lithium battery (included) List of packages: 1 x Internal Monitor 1 viewfinder for doors 6 x Screw 1 x Mounting Plate 1 USB cable 1 x Manual