【Smart Visual Doorbell】 4.3-inch color display for clear visitor identification and enhanced home security 【High-Definition Video】 640x480 resolution camera with 300,000 pixels for crisp, detailed images 【Wide-Angle Coverage】 130° wide-angle lens ensures a comprehensive view of your entryway 【Long-Lasting Battery】 800mAh doorbell battery and 400mAh display battery for extended use between charges 【Two-Way Audio】 Built-in speaker and microphone enable clear communication with visitors Specifications: Material: ABS, PCBA, polymer battery, speaker, camera, hardware Battery: Doorbell 800mAh, Display 400mAh Power Input: 5V?1A Usage Time: Over 3 months of normal use Charging Time: 1.5 hours Standby Time: Over 1 year Storage: Supports up to 128GB external TF card Display Size: 4.3 inches Camera Resolution: 640x480, 300,000 pixels Doorbell Dimensions: 107mm x 42mm x 18.5mm Display Dimensions: 120mm x 954mm x 17mm Weight: Doorbell 52g, Display 131g, Total 185g