Item Type: Digital Door Viewer Material: ABS, zinc alloy Uses: Suitable for all kinds of places, such as homes, apartments, office buildings, hotels and other places, iron doors, wooden doors, antitheft doors, glass, wooden doors, etc. Display: 4.3in Pixel: 1MP Imaging Angle: Horizontal 120°, Diagonal 170° Ringtones: 4 Storage Method: Memory Card (1-32G) (not included) Infrared Light: 2pcs Motion Detection: The Sensing Distance is 1-2m/3.28-6.56ft (The Sensing Distance is Related to the Temperature Environment) Battery: 2500mAh Lithium Battery x 1 (Built in) Battery Type: None Suitable for Door Thickness: Approx. 40-120mm/1.57-4.72in 1、Characteristic: Peephole video doorbell, 4.3 inch high definition screen, 1 million pixels, high definition photo quality, giving you clear image. 2、Auto Recording: When the visitor presses the doorbell button, the smart door viewer will automatically take a picture and store it, convenient for you to check in the future. 3、Night Vision: Automatically switch to night vision mode when the light is insufficient, so that visitors are clearly visible no matter the day or night. 4、FIFO Function: When the storage space is not enough, the system will delete the oldest photos in chronological order, more convenient to use. 5、Ultra Long Standby Time: The smart video doorbell is designed with low power chips, and the longest standby time can reach 120 days, suitable for home, hotel, etc. 1 x Digital Door Viewer 1 x Screen 1 x USB Cable 1 x Installation Plate 6 x Screw 1 x Manual