Call Audio Master Station Indoor Height (In.) 2 in Width (In.) 6 5/16 in Depth (In.) 5 3/16 in Door Station Height (In.) 2 in Door Station Width (In.) 6 5/16 in Door Station Depth (In.) 5 3/16 in Master Depth (In.) 2 in Master Height (In.) 6 5/16 in Master Width (In.) 5 3/16 in Distance (Ft.) @ 18AWG 1 570 ft Distance (Ft.) @ 22AWG 650 ft Wiring Conductors 2 Conductors Wire Type 22 AWG Power Source 6V AC Voltage 6V AC For Use With LE Series Includes Mounting Hardware