Electronic Door Viewer 4' Silver

technical data:color: silverpower supply voltage: 3 x aaanight lighting: nodoor thickness range: 42 ~ 70mmcamera dimensions - width: 32mmcamera dimensions - height: 32mmbattery included: nocamera dimensions - depth: 49mmmonitor dimensions - width: 121mmsd card reader: nomonitor dimensions - height: 64mmmemory: nomonitor dimensions - depth: 17mmdisplay: 4mounting hole dimensions: 14 ~ 30mmvideo peephole replaces the traditional optical peephole (so-called peephole). It allows you to view a person standing directly in front of the door on the screen of a 4 color lcd display. A discreet wide-angle camera adapted to be mounted in place of standard optical viewfinders with a hole diameter of 14 mm - 30 mm. The device is particularly helpful for the elderly short people and those with poor eyesight.**illustrative photos.