This door viewer will automatically save an image into its internal memory, along with a time and date stamp. The door bell is integrated on the outside. The image is very clear and the unit is very easy to operate - just press one button. Can replace mechanical door viewer without additional work, Infrared camera with night mode function. All fixings included. Additional features: 3.5 inch LCD screen, with a viewing angle of 105 degrees. Manufacturers 2 year guarantee.