Check the listing for details. COMMAX 8 Buttons Audio Intercom Door Panel DR-8UM. Condition: New. Listed at 149.00 USD. COMMAX APARTMENT INTERPHONE SYSTEM 8 BUTTONS AUDIO DOOR STATIONModel: DR-8UM 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/Specifications: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, 1 amp (using RF-1A)Dimension (mm): 130(W) x 315(H) x 10(D)Fillupbox size (mm): 122(W) x 305(H) x 37(D) ***POWER ADAPTER IS NOT INCLUDED*** Connection Diagram: Connectable devices: Power adapter AC110V to DC12V RF-1A Power adapter AC110~240V to DC12V RF-12015S Room station DP-SS Also available as a set with room unit and power supply: