Description: 3.5inch color display, screen will automaticly be in sleep model after . Monitor outside anytime when button,each time will automaticlly take photo. Built-memory ,cantake 100pcs photoes ,Cycel replacement. When visitor press call button ,screen automaticly turn on and take photo. Press UP/DOWN key to view photoes any time.Or Select preview menu ,it will enter the slide mode to play automaticlly . Menu seting (menu adjustment include:brightness adjustment,contract adjustment,color adjustment,language selection,date,time,photo's checking, photoes). 3pcs AA battery ,support to view outside for more than 1200times. "Don't disturb" function: In sleep model, long hold monitor button for about , red led light at right bottom of screen will flash,successfully set "don't disturb" function. In "don't disturb" model,when anyone press call button , ,no view outside. Cancel "don't disturb": long hold for about until screen turn on with video. Specification: Material: Plastic Size: 120 x 80 x 30 mm/4.72 x 3.15 x 1.18 inch Sensor : 300,000 pixels Fits any door:42-60 mm thickness60-90mm ( thickness ),pls confirm the door thickness with dealer before purchase. Package Includes: 1 Piece 3.5 inch indoor Display 1 Piece Out-door Camera 1 Piece English Manual Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor.