Audio door intercom with three call buttons, made of 2mm stainless steel (IP44). With illuminated nameplates and stainless steel call buttons as well as an integrated RFID reader for controlling the door opener. Acoustic and optical signaling of the door opening. Front panel fastening using a captive countersunk screw connection. 4-wire connection to the VT100 system via RJ45 socket or screw terminals. Connection for door opener (8V AC or 12V DC, max. 1A). Power supply 15V DC, max. 200mA from system power supply unit. Delivery includes transponder chip (RFID tag) in key chain format. Dimensions: 90 x 197 x 2mm (front panel), 73 x 179 x 32mm (rear of housing). Matching accessories: Surface-mounted housing made of stainless steel VT100APA1, flush-mounted housing VT100UPA1 or hollow wall mounting kit VT100HB.