Flush / surface-mounted external video entry phone (the external unit is surface mounted but a box art. 3554 is also provided to allow flush mounted installation of the external unit) with anodized aluminium facing and nameplate holder, with LED rear-lighting. 12V AC power supply. Dimensions of external unit: 95x176x15 mm. DImensions of flush-mounted box: 95,5x176x5x35 mm.