1. Description - 2.4-inch peephole: The 2.4-inch peephole allows you to clearly see the person at the door, making it easy to identify visitors and communicate with them. - 120-degree intelligent digital door viewer camera: The intelligent digital door viewer camera can capture high-quality videos of visitors, making it easy to identify visitors and communicate with them. - 240 x 320 high-definition video doorbell: The 240 x 320 high-definition video doorbell can clearly and meticulously capture the images of visitors, making it easy to identify visitors and communicate with them. - 300,000-pixel resolution: This doorbell has a resolution of 300,000 pixels, which can clearly capture the images of visitors, making it easy to identify visitors and communicate with them. 2. Specifications - Material: Zinc alloy - Screen: 2.4-inch LED screen - Viewing angle: 120° - Camera: 300,000 pixels - Resolution: 240 x 320 - Applicable thickness range: 35 - 110 mm - Applicable door opening range: 14 - 22 mm - Power supply: 3 x 1.5V AAA batteries / 5V/1A external power supply - Dimensions: 80 x 80 x 20 mm 3. Precautions - Applicable door opening range: 14 - 22 mm - Door thickness: 35 - 110 mm