Digital Door Viewer Peephole Door Doorbell 2.8-inch LCD Screen Photo Digital Door Monitoring for Home LCD Screen Display: The 2.8-inch display allows you to easily see the faces of visitors. It is safer and more practical. Photo : 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 " to takes photo too. Easy to make a visitor record. Power Supply Mode: Powered by 4 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 . Wide Viewing Angle: 90-degree wide-angle lens allows you to see a larger picture without missing any visiting friends. More Supports photo browsing, power-on status settings, visitor records deletion.