【Low-temperature Wire Design】This lens heating insulation belt can withstand the temperature of minus 40 degrees. It will not freeze when used for a long time in cold temperatures, and will still maintain the flexibility of the wire. | 【Velcro Fixation】The demister belt is fixed with velcro, which can not only make the heating belt fit the lens, but also adjust the required length and facilitate disassembly. | 【Three-stage Temperature Regulation】This demist heater has three different temperature switches, of which the temperature at the low level is 35-45 °, the temperature at the middle level is 45-55 °, and the temperature at the high level is 55-65 °. Please note that these temperature data are obtained through daily data testing, which will fluctuate due to the external environment. | 【High-quality Production Material】It is made of composite fiber heating wire+diving material and glue, so it is faster and safer. | 【External USB Port Design】USB port connection is convenient for the long-term outdoor use of the defroster heater, and the 31.5-inch long cable is convenient for the connection and use of the defroster heating belt.