3.5" Color TFT Screen Digital Electronic Peephole Viewer w/ 100 Photo Memory Recording Easy DIY installation, Powered by 3 x AAA batteries, no wiring required Camera Sensor: 300,000 pixels, Wide view angle 170degree Compensates for low-light images and eliminates "fish eye" distortion Built-in memory and auto-photo feature (100 photos before cycle replacement). "Do not disturb" function (sleep mode).( no ring & monitor view for sleep mode)