Shrxy 800TVL CCD mini DOOR eye Camera 170 Degree Wide Angle FISH EYE LENS CCTV Camera-NTSC 1.78mm Lens; 175Wide View Angle, catch every corner 1/3" Sony Color CCD sensor, great video quality and advanced image sensor Fitness Door Peephole Diameter: 23-30mm; Metal Housing;Easy Installation Mini cctv camera 12v DC (Adapter Power Supply Included) IMPORTANT: Please check the second image, make sure you can install by yourself. You need to enlarge your peephole size by yourself to fit this door camera's size, that is very important.