Call Audio Master Station Indoor Height (In.) 3 Width (In.) 9-3/8 Depth (In.) 7-7/8 Door Station Height (In.) 3 Door Station Width (In.) 9-3/8 Door Station Depth (In.) 7-7/8 Master Depth (In.) 3 Master Height (In.) 9-3/8 Master Width (In.) 7-7/8 Distance (Ft.) @ 18AWG 1600 Distance (Ft.) @ 22AWG 650 Wiring Conductors 20 Conductors Wire Type Shield Power Source 12VDC Voltage 12VDC For Use With LE Series Includes Mounting Hardware