Features:- Safety, long service life,energy saving,surface insulation.- Easy installation, automatic thermostat.- Constant temperature heating, no open flame, high thermal conversion rate, affected by the supply voltage is minimal.- Automatic energy-saving features, when the heater to the ambient temperature increases, the power will gradually reduce, only the rated power of 90%, 80%, or less.Specifications:Model: 12V 400WColor:Silver ToneRating Voltage: 12VRating Power: 400WHeat Material: PTC ThermistorHeat Methods: Heat ConductionMounting Hole Size: 3mmMounting Hole Center Distance:130mm/5.12",45mm/1.77"Size: 150x67x19mm/5.91x2.64x0.75"(corrugated length of about 110mm/4.33")Application:Air Conditioning Units, Air Curtain Machine, Drying Machine, Dryer, Heater,Cars, Need to provide warm air devices, etc.Dissipation Power: (Because of the different users to use, and the characteristics of PTC itself and energy saving,insulation type PTC heater product actual use most of the energy dissipation within 50% to 100% of the rated power.Dry Power: about 15% of the rated power.Packaged included:1 x PTC Heating Element( Included Wire)