... Simply press the POWER button to turn on 4. With Door Bell RingProduct Features:1.Easy one ... steps DIY installation 5 0.3 Mega Pixels,4 X digital zoom6. Clear color screen,beautiful appearance ... Power1800MA batteriesCamera 0.3 Mega Pixel camera, 4 X digital zoom Display Screen: 2.8-inch high definition ... , no wiring (2) 2.8-inch TFT color display, 300,000 pixels (3) infrared mobile surveillance, sensing ...