PTC product has an automatic energy-saving features, the heater when the ambient temperature is raised, the power will be gradually reduced, only 90% of rated power, 80%, or less. Long life: when in normal use PTC products is not damaged because of their own reasons, or even thousands of times repeatedly switch has no effect on its performance, a measure of its life is its degree of aging. standards for power decay after 2000 hours is less than 10%. PTC products with constant fever, no open flame, heat conversion rate, subject to the supply voltage with minimal impact and other traditional heating elements can not match advantage, used in electric appliances in more and more popular in the R D engineers. Safety, surface insulation.Heat the and the gas. Specification: Heat material: PTC Thermistor. Voltage: 12V . Heating life: over 3 years. Heat methods: Heat radiation by air flow. Color: As pictures shown. Main usded in: clothes dryer / Air conditioning units / Equipment / electric appliance / Air curtain machine etc. Power consumption: 50W. Surface temperature: 23010. Tips: 1. Be careful when use it. 2. This is a kind of Surface-Electrified PTC heater. 3. When the heater is working, the aluminum parts are conductive. Package Including 1 x PTC Heating (other accessories in the picture is not included.)