SMAKN&reg; DC 12V 20-90 Heat cool temp Thermostat temperature control switch Thermometer Model: W1701 Size: Approx. 1.44*1.44*0.71inch / 36.5 * 36.5 * 18mm Installation screw: M3 * 2 diagonal size 39.5mm Control Mode: Heating, Cooling, Heat dissipation Can be used in the (liquid, mold, space) and other control heating