Product List: Doorbell Unit*1 + Indoor Display Screen*1 + Charging Cable*1 + Installation Adhesive Pad*1 + Screw Set*1 + Instruction Manual*1 Purchase Specification: Black Material: ABS Battery Capacity: Doorbell 1000mAh / Display Screen 400mAh Power Input: 5V=1A Usage Time: Over 3 months under normal use Charging Time: 1.5 hours Standby Time: Over 1 year Recording Storage: Supports up to 128GB external TF card, auto snapshot & video recording Display Size: 4.3 inches, color screen Camera Resolution: 640*480 300K pixels Doorbell Unit Dimensions: 140*58.6*30.5mm Display Unit Dimensions: 125*99.6*22mm Net Weight: 280g Product Features: 1. 2.4G wireless video intercom system. No wiring or WiFi required when pairing doorbell with display unit. Video intercom with display offers enhanced convenience; 2. Enhanced image quality with 300k resolution, restoring true colors for high-definition video that captures fine details and clearer recordings; 3. 4.3-inch HD large screen for sharper imaging. Automatically displays the door view when the doorbell rings for easy monitoring. Supports up to 128GB memory; enables snapshot/recording when memory card is inserted; 4. Night vision capability with 6 built-in infrared illuminators that automatically activate based on ambient light levels; 5. Rechargeable battery design; continuous screen use requires connection to an external power source; 6. Portable installation—can be mounted with adhesive or through drilling.