Features:3.5 inch TFT color display screen.16 pcs of adjustable chord music for option.Wide viewing angle of 150 degree.LED indicator of low battery power.Saving-power design.When visitor press call button， screen automatically turn on.Easy DIY installation， powered by 3 * AA batteries which can support view outside more than 1200 times.Screen will automatically be in sleep mode ("Do not disturb" function) after 10 seconds once you press "monitor" button.Electronic door eye viewer which makes it more convenient and safer to view who is outside.Specifications:Screen: 3.5 Inch LCD screenSensor: 0.3 Mega pixel high resolutionView Angle: 150 DegreeNo-disturb Function: SupportExternal peephole barrel: 32mm / 1.3inInternal peephole barrel: 21mm / 0.8inFit door thickness: 30 ~ 60mm / 1.4 ~ 2.4inOutdoor unit diameter: 60mm / 2.4inDoorbell Function: SupportPower: 3 * AA Batteries (not included)Outdoor camera weight: 30g / 1.1ozIndoor monitor size: 15.5 * 10.3 * 3.2cm / 6.1 * 4.1 * 1.3inIndoor monitor weight: 160g / 5.6ozPackage weight: 330g / 11.8ozPackage size: 19 * 14 * 11cm / 7.5 * 5.5 * 4.3inPackage List:1 * Indoor Monitor1 * Outdoor Camera1 * Based-flange1 * Peephole Barrel1 * User's Manual (English)