Feature: 1. 4.3in LCD Screen: 4.3 inch digital large LCD screen, high definition LCD display with 1MP, let you clearly see everything outside the door. 2. Motion Detection and Video Recording: Door viewer can sense visitors outside the door, and automatically start recording if there are moving objects outside the door, supports up to 32G memory card (not included). 3. 120° Wide Angle: This digital door viewer has wide angle lens, horizontal 120°, diagonal 170°, provides you with a large field of view to ensure home safety. 4. Video Doorbell System: 2 in 1 design, doorbell and door viewer , there are a variety of ringtones to choose from, the volume can also be adjusted freely. 5. Rechargeable: Built in large capacity lithium battery, cycle charging is more environmentally friendly. Suitable for all kinds of places, such as homes, apartments, office, etc. Specification: Item Type: Digital Door Viewer Material: ABS, Zinc Alloy Usage: Suitable for all kinds of places, such as homes, apartments, office buildings, hotels and other places, iron doors, wooden doors, anti theft doors, glass wooden doors, etc. LCD Display Size: 4.3in Image Sensor: 1MP Imaging Angle: Horizontal 120°, Diagonal 170° Recording Mode: Photo or Video Motion Detection: Support the sensing distance of 1-3 meters / 3.28-9.84ft, the sensing distance is related to the ambient temperature Storage Method: Memory Card (1-32G) (not included) Infrared Night Vision: 2pcs 850nm Infrared Light Power Supply Mode: 3000mAh Lithium Battery x 1 (Built in) or DC5V Menu Language: Chinese or English Ringtones: 12 Polyphonic Music Suitable for Door Thickness: Approx. 35-120cm/13.78-47.24in Working Ambient Temperature: -20-55℃. Package List: 1 x Digital Door Viewer1 x Screen4 x Screw1 x USB Cable1 x Manual Note: Do not place the product in excessively humid and high temperature environments