Feature: 1. LCD CAMERA: The 3in HD LCD screen is used in conjunction with the camera to clearly display the scene outside the door, effectively protecting the home safety. 2. MULTIPLE FUNCTION: The camera has HD 720P resolution, supports 160 degree wide angle vision, and has PIR motion detection and human body sensing functions. 3. POWER SUPPLY: This smart doorbell is powered by Li ion battery, intelligent power saving technology, standby time up to 180 days, can meet your daily needs. 4. GOOD SAFETY: The doorbell is combined with visual peephole for enhanced security, the night vision function enables real time monitoring and security protection. 5. WIDE APPLICATION: Widely used in security equipment for homes, hotels, villas, apartments, etc., convenient and practical, with a wide range of applications. Specification: Item Type: Smart Visual Doorbell Model: SY 1 Material: ABS, LCD Screen Size: 3in Screen Resolution: 720P Camera: 2MP Viewing Angle: 160° Infrared Light: 2pcs Micro Memory Card Slot: Supports up to 32GB Other Functions: PIR motion detection, human body sensing function Applicable Door Hole: Approx. 14-60mm / 0.6-2.4inApplicable Door Thickness: Approx. 35-110mm / 1.4-4.3inBattery Type: 1200mAh Li ion battery (built in). Package List: 1 x Indoor Doorbell1 x Outdoor Doorbell1 x Metal Bracket1 x Charging Cable6 x Screws1 x User Manual