Digital peephole 8991 metal/plastic 120 degree 38 mm/116 mm. Features a 3.5″ color screen and a 1.0 megapixel camera. External dimensions are 119 x 63 x 19 mm. Quick and easy installation for standard door drilling of 14-28 mm, with no further drilling required on the door. Subsequent installation and removal are possible at any time. After activation, the screen automatically switches off after 15 seconds. Suitable for door thicknesses of 38-116 mm. Operating temperature ranges from -10° to +50° Celsius. Viewing angle is 120°. Requires 4 x AAA batteries (not included). Further technical features include an electronic version with a screen.