With its 2.8" LCD display of 3M pixel sensor, it can show you a high resolution image. Anyone can use it easily, even children and the one with poor eyesight. * The Peephole has a wide visual angle of 60 degree to ensure you can actually see the people outside. * The one outside won"t realize when you are looking at him. It"s safely for anti-spy. * With a sheet metal, it helps you to remove the traditional peephole; One gummed paper, fix the digital peephole viewer, easy to install. Low power consumption. * With taking pictures function when there is nobody at home, support SD Card, up to 16 G, SD card not including.