Audio Intercom Module, Slave, Wall Mount, Gray, Signal output 100 db, Operating Range -31 to 150 Degrees F, 25 W, Master Depth (In.) 5 1/4 in, Master Height (In.) 9 9/10 in, Master Width (In.) 6 7/10 in, Voltage 120V AC, 0.24A, Standards CSA Certified,...