Audio Master Station, Indoor, Height (In.) 2 1/8 in, Width (In.) 7 1/16 in, Depth (In.) 5 5/8 in, Door Station Height (In.) 2 1/8 in, Door Station Width (In.) 7 1/16 in, Door Station Depth (In.) 5 5/8 in, Master Depth (In.) 2 1/8 in, Master Height (In.) 7 1/16 in, Master Width (In.) 5 5/8 in, Distance (Ft.) @ 18AWG 1,570 ft, Distance (Ft.) @ 22AWG 650 ft, Wiring Conductors 2 Conductors, Wire Type 22 AWG, Power Source 12V AC, Voltage 12V AC, For Use With LEM Series, Includes Mounting Hardware