Door Station Indoor/Outdoor Flush Mount Height (In.) 8 1/4 in Width (In.) 5 21/64 in Depth (In.) 1 in Door Station Height (In.) 1 in Door Station Width (In.) 10 in Door Station Depth (In.) 1 in Master Depth (In.) 1 in Master Height (In.) 8 1/4 in Master Width (In.) 5 21/64 in 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 24V DC Voltage 24V DC