Primary Station, Indoor, Height (In.) 2 7/8 in, Width (In.) 8 1/4 in, Depth (In.) 3 15/16 in, Door Station Height (In.) 2 7/8 in, Door Station Width (In.) 8 1/4 in, Door Station Depth (In.) 3 15/16 in, Master Depth (In.) 2 7/8 in, Master Height (In.) 8 1/4 in, Master Width (In.) 3 15/16 in, Distance (Ft.) @ 18AWG 1,200 ft, Distance (Ft.) @ 22AWG 500 ft, Wiring Conductors 6 Conductors, Wire Type Shield, Power Source 12V DC, Voltage 12V DC, For Use With TD Series, Includes Mounting Hardware