Features: Three feet is a normally closed and a normally open function when the object to be controlled by temperature changes, so that the thermostat temperature working fluid to produce, the corresponding part of the thermal expansion and contraction. Physical phenomena (change in volume of working fluid), temperature sensor bellows part communicating joints produce expansion or contraction. Through leverage, driven by the switch-off operation, to achieve the constant temperature target. Temperature controller only, other accessories demo in the picture is not included! Specification: Type: Temperature Controller Material: ABS, Metal Applications: Shower, drum-type washing machines, heaters, stainless steel automatic boilers, electric frying pans, food machinery, medical equipment, kitchen freezer, fresh cabinet, refrigerator, Ice machine, lake with fish, cold drinks machine, heating machine Features: Temperature Control, Refrigeration, Household appliances, Knob, Adjustable Line Length: app.70cm/27.56in Color: Black, silver Quantity: 1 Pc Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 Pc x Temperature Controller