Check the listing for details. COMMAX Audio Intercom Lobby/Door 8-button Panel for 8-Apartment Building DR-8AM. Condition: New. Listed at 110.00 USD. COMMAX INTERCOM LOBBY UNIT FOR 8-APARTMENT BUILDING8 BUTTONS AUDIO DOOR STATION DR-8AM DR-8AM: 8 Buttons Audio Intercom Panel. Door Entrance Unit.COMMAX Door Station compatible with various systems provides you better efficiency to the system and guarantee more secure an comfortable life. Features:Function: Call residential station for up to 8 residential stations/ name card.House call & TalkConnectable product: DP-KSS, DP-SS, DP-MLMaterial: Aluminum panel/ Flush mount typeWiring: Common 3 wires, Individual 1 wire per Unit.Power Source: DC 12V (use RF-1A or RF-12015S, sold separately)Dimension (mm): 125(W) x 236(H) x 11(D)Flush box size (mm): 112(W) x 213(H) x 60(D) Installation Diagram: Compatible devices: Power adapter AC110~240V to DC12V RF-12015S Room station DP-SS Also available as a set with room units and power supply: Set of DR-8AM, DP-SSx8, Power supply