Fan Coil Thermostat, Electric Line Voltage, Electric Low Voltage, Thermostat Switch Type SPDT, Switch Action Open/Close on Rise, Number of Switches 1, Thermostat Control Range 50 Degrees to 90 Degrees F, Differential (Deg. F) 3, Thermostat Heating/Cooling Heating/Cooling, Thermostat Number of Pipes 4, Thermostat Number of Speeds 3, Fan Switching Hi-Med-Low, System Switching Heat-Off-Cool, Sensor Type Bi-Metal, 4 1/2 in, Sensing Bulb Dia. (In.) -, 2 7/8 in, Sensing Bulb Length (In.) -, 1 1/16 in