Catalog > Consumer Electronics > Security & Alarms > Access Control > Intercom Systems Commax 1:1 Surface Entrykit 6 VDC 1:1 Surface 6 VDC Entrykit CMX DP-KD/DR-4D COMMAX DP-KD/DR-4DS 1:1 SURF ENTRYKIT 6vDC [PI1230] Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Talk with VisitorDoor Release Function Specifications Power Source : 4pcs x 1.5V (AA size battery) Idling: 15mACall Sound Output Power : Chime Signal : 210mWMounting Type : Surface Mounted TypeEffective wiring Distance : 300m using 0.65 Copper WireDimension : Room station: 4.35 x 9.85 x 21.5 cm, Door Station: 12.5x20x3 cmWiring : 4 Wire from Room Unit to Door Unit, 4 Wire from Room Unit to Electric Lock.