Master Station, Indoor/Outdoor, Height (In.) 5-51/64, Width (In.) 10-1/16, Depth (In.) 1-7/8, Door Station Height (In.) 1, Door Station Width (In.) 10, Door Station Depth (In.) 1-7/8, Master Depth (In.) 1-7/8, Master Height (In.) 5-51/64, Master Width (In.) 10-1/16, Talk Channel Output (W) 50 Watts Peak (25 Per Channel), Listen Channel Output (W) 50 Watts Peak (25 Per Channel), Wiring Conductors 2 Conductors, Wire Type Non-Shielded, Power Source 24VDC, Voltage 24VDC, Video Capable Yes