BShomer-Tec Reverse Peephole Viewer ReviewbP PP Shomer-Tec Reverse Peephole Viewer PDeveloped to assist law enforcement officers assess potential threats and view real-time activity behind a door when the door has a peepholePProvides a clear, discreet view into the room through a door's peepholePEffective on all major brands of standard door peepholes used on apartment, hotel, and residential doorsPNewly-updated and improved version of one of our most popular products provides a clear, discreet view into the room through a door's peepholePLength: 2.8 ; Weight: 2.2 oz.