SimplebusKIT system audio-video unit with terminal block complete with front-adjustable wide-angle 1/4” colour black and white and LED camera illumination. Complete with terminal block and digital audio management system with Ecocancelling, watertight loudspeaker and electret microphone; loudspeaker volume can be adjusted from the front. Complete with microprocessor and DIP SWITCH with 8 positions for programming calls to users. Audio-visual indications for disabled individuals assistance request can be activated via programming. 33Vdc power supply via special power supply unit. On-board electronic lock-release function (3A), plus C, NC, NO 10A relay contacts. For use in modules Art. 33410, 33411 and 33412. Dimensions: 102x55x38 mm. Timed lock-release input and door open indication.