Video Door Station, Indoor/Outdoor, Height (In.) 2 1/2 in, Width (In.) 5 in, Depth (In.) 8 13/16 in, Door Station Height (In.) 2 1/2 in, Door Station Width (In.) 5 in, Door Station Depth (In.) 8 13/16 in, Master Depth (In.) 2 1/2 in, Master Height (In.) 5 in, Master Width (In.) 8 13/16 in, Distance (Ft.) @ 18AWG 650 ft, Distance (Ft.) @ 22AWG 330 ft, Wiring Conductors 2 Conductors, Wire Type Non-Shielded, Power Source 24V DC, Voltage 24V DC, For Use With KB Series, Includes Mounting Hardware