The KC 1 x 3 Color Video Sentry series is a video entry system with capacity for one video door station and up to three inside monitor/handset stations. It allows access control of 1 entrance from up to 3 different stations (rooms), which includes a camera unit (KC-DAR), master monitor (KC-1GRD), sub monitor (KC-1GRD) and audio-only sub station (KC-1SD).