Security: PTC products with constant , no open , heat conversion rate,subject to the supply voltage with impact and other heating can not match advantage,used in electric appliances in more and more in the R & D engineers. Energy saving: PTC product has an automatic energy-saving features,the heater when the temperature is raised, the power will be gradually reduced,only 90% of rated power, 80%, or less. : When PTC product under normal use will not damage their own reasons,or even thousands of repeatedly switch has no effect on performance,a measure of life is degree of aging. General standards for power decay after 2000 hours is less than 10%. Rated Power:100W Rated Voltage:220V AC/DC consistance temperature: 200 +/- 10 Celsius Size:113 x 35 x 26mm heat material: PTC Thermistor heat methods:heat radiation flow lead wire: silicone high temperature line Suitable For:small instrument, small box body temperature heating space environment Package Contents: 1 x Insulated PTC Ceramic Air Heater Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.