Video Door Station, Indoor/Outdoor, Height (In.) 6 13/16 in, Width (In.) 3 7/8 in, Depth (In.) 1 1/16 in, Door Station Height (In.) 6 13/16 in, Door Station Width (In.) 3 7/8 in, Door Station Depth (In.) 1 1/16 in, Master Depth (In.) 6 13/16 in, Master Height (In.) 3 7/8 in, Master Width (In.) 1 1/16 in, Distance (Ft.) @ 18AWG 330 ft, Distance (Ft.) @ 22AWG 165 ft, Wiring Conductors 2 Conductors, Wire Type Non-Shielded, Power Source 18V DC, Voltage 18V DC, For Use With JF Series