<b>Lens heating</b><br> This practical lens heater protects cameras or telescopes from ice, dew and fog.<br><br> This product is equipped with an 32inch temperature regulator, with low, medium and high modes, which you can adjust the temperature according to different needs.<br><br> <b>Specifications</b><br> Length: 17inch<br> Width: 2inch<br> Material: polyester and cotton,etc.<br> Voltage: 5V<br> Current: 1.4A<br> Power: 7w<br> USB cable length: 5ft<br> Heating for 10 minutes, the temperature can reach 104℉-140℉.<br><br> <b>How to use:</b><br> First please plug the temperature regulator USB into the charger or power bank, then plug the lens heater USB into the USB socket of the temperature regulator, and after switching on, turn on the temperature regulator switch to adjust.