Features: LCD Screen: The 2.4 inch LCD screen allows you to easily see visitors' faces. It's safer and more convenient. Shooting: When the visitor presses the doorbell, the indoor host will ring and the LCD will light up to take a photo. Power mode: Powered by AAA batteries (not included), just open the battery cover on the side of the indoor host, no need to remove the doorbell. Wide Viewing Angle: The 160-degree wide-angle lens lets you see a bigger picture without missing any visiting friends. Night vision function: With the night vision function, you can see clearly at night. Specifications: < br />Display: 2.4-inch LCD screen, Image sensor: 1.3 million pixels Viewing angle: 160 degrees Display mode Power supply: 4 AAA dry batteries (not included) TF card: Maximum support 32G Ringtones: 5 Languages: 8 Suitable to door hole: 15-60mm Suitable for door thickness: 40-100mm Indoor unit size: 22×97×97mm > Outdoor unit size: diameter 65mm Package list: Indoor host ×1 Outdoor handset×1