Sensor: CMOS, 0.3M PixelsView Angle: 170 degreeDisplay: 3.5 inch LCD ScreenInstallation & Operation: Conveniet Operation, Simple Installation, no wiringIndoor Host Device Monitors Outside, Doorbell AlertAutomatically Take Photo: Take a piece of photo after pressing doorbell button or Indoor Monitor buttonDon't Disturb Function: Press Indoor Monitor Button 10 secondsLanguage: Chinese/EngllishDate & Time: Y/M/D H/M/SPreview: YesDelete File: Yes/NoPower Supply: 3xAA Alkaline Battery