I use the thermostat to a mini-fridge to make a regulated Peltier small air chamber. This works well because the thermostat can control by entering the boundaries of the turning on and off either the heating or cooling ("heating" eg refrigerator switched on the thermostat a = 21.0 ° C and 22.3 ° C Enter from =) to cool reversed , Is simply plugged into the wall socket and the device to be controlled in the thermostat sensor (diameter 8mm rear front 6mm) is hard-wired with 3 m cable, operation is einfach.Xavax 00,111,930 Universal Thermostat "UT 200"