Call Audio Master Station Indoor Height (In.) 3 in Width (In.) 9 3/8 in Depth (In.) 7 7/8 in Door Station Height (In.) 3 in Door Station Width (In.) 9 3/8 in Door Station Depth (In.) 7 7/8 in Master Depth (In.) 3 in Master Height (In.) 9 3/8 in Master Width (In.) 7 7/8 in Distance (Ft.) @ 18AWG 1 600 ft Distance (Ft.) @ 22AWG 650 ft Wiring Conductors 20 Conductors Wire Type Shield Power Source 12V DC Voltage 12V DC For Use With LEF Series Includes Mounting Hardware