Call Audio Master Station Indoor Height (In.) 2 3/16 in Width (In.) 8 1/8 in Depth (In.) 7 1/2 in Door Station Height (In.) 2 3/16 in Door Station Width (In.) 8 1/8 in Door Station Depth (In.) 7 1/2 in Master Depth (In.) 2 3/16 in Master Height (In.) 8 1/8 in Master Width (In.) 7 1/2 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 LE Series