Low Voltage Thermostat Terminal Designations B G O RC RH W Y System Switching Heat-Cool-Off Fan Switching No Automatic Changeover No Dual Transformer Compatible No Power Method Hardwired Voltage 24V AC 750mV Compatible No Mounting Wall or Junction Box Height 4-13/32 in Width 4-45/64 in Depth 1-5/16 in Color White Control Range 50 Degrees to 90 Degrees F Features Removable Fan Switch For Use With Heating Cooling Includes Screws Wall Anchors