This product is a kind of adjustable thermostat. It makes use of the principle of bimetal's from variation underdifferent temperature to open and close circuit,that is to saybimetal form varitation will drive the spring plate construction to move, thus the pair of contacts on the construction will contact and separate to realize the electrical circuit's open and close. Sometimes the construction of the thermostat will change to meet customer's requirement for easy installation. Our thermostat are widly applied to heating eletrical appliance in small size, such as electrical heating, heating fan machine, it can be used to adjust temperature as well as to be a power switch or a tiled switch. as one of parts of appliance, this product, without outer covering, should be inside of the appliance when installed for ensuring safety.