Features: LCD Screen Display:The LCD Screen Displayallows you to easily see the faces of visitors. It is safer and more practical. Photo Shooting:When the visitor presses the doorbell, the indoor host rings and the LCD screen turns on to take a photo. In power-on mode, you can press "power key" to takes photo too. Easy to make a visitor record. Power Supply 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. The screen supports power display. Built-in Memory: With built-in memory, it stores photos in a loop, no need for a memory card. Wide Viewing Angle: 90-degree wide-angle lens allows you to see a larger picture without missing any visiting friends. More Features: Supports photo browsing, power-on status settings, visitor records deletion. Specifications: Model Number: W5 Display: LCD screen Power Supply: AAA batteries(not included) Door Thickness: 35mm-120mm Mounting Hole Size: 14-22mm Package List: 1*Indoor Host 1*Peephole Camera 1*Bag of Screws 1*Bracket 1*User Manual