Highlights: ·With door-opening function ·Surface mounting ·Illuminated door bell button Technical Specifications: Colour: White · Connecting wires: 2 · Dimensions (external unit): (H x W x D) 82 x 226 x 33 mm · Flush mounting: No · Illumination type: Illuminated information field and Key Ring · Interior unit dimensions: (W x H x D) 90 x 200 x 45 mm · Max. ringerl volume: 83 dB (A) · Mounting type: Wall-mounted · Number of melodies: 1 · Number of units: 3 · Operating voltage: 230 V/50 Hz Via RaiL Transformer 12 V/2 A · Specification: Three-family home · Surface mounting: Yes Description: door intercom systems for the three families house For the installation of the door intercom, you only need the existing 2 wire doorbell cable this system is ideal for expansion, renovation and modernization The outdoor unit is equipped with an illuminated information field and a lighted doorbell button The voice volume is adjusted at the indoor unit. About the included DIN Rail Transformer most strikes can be controlled, so an additional power supply is not required.