1. Security: PTC products with constant fever, no open flame, heat conversion rate, subject to the supply voltage with minimal impact and traditional heating elements can not match advantage, used in electric appliances in more and more popular in the R & D engineers. 2. Energy saving: 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. 3. 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. General standards for power decay after 2000 hours is less than 10%. Size:9*3.1*2.5cm Package Included:1Pc Note: Due to manual measurement, please allow an error of 1-3mm. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image.