Fan Coil Thermostat, Line Voltage, Thermostat Switch Type 5 Relays, Switch Action -, Thermostat Control Range 50 Degrees to 90 Degrees F, Differential (Deg. F) +/-2, Thermostat Heating/Cooling Heating/Cooling, Thermostat Number of Pipes 2 or 4, Thermostat Number of Speeds 3, Fan Switching Hi-Med-Low-Auto-Off, System Switching Auto-Heat-Cool-Off, Sensor Type -, 3 13/16 in, Sensing Bulb Dia. (In.) -, 5 13/16 in, Sensing Bulb Length (In.) -, 1 1/8 in, Capillary Length (In.) -