Tydeux40cm DC Lens Warmer, Lens Dew Heater Strip, Stepless Temperature Regulator, Condensation Prevention for Telescopes Camera DSLR Lens Telescope Eyepieces Less Than 5 inch (125mm) in Diameter

I obtained this to help with my desert photography when it’s very cold. I have a small portable DC port power source that works well for handheld or tripod use. It has adjustable heat levels and it can warm the lens quickly. I managed to figure out how to use the item in spite of it arriving without any support or user information. Perhaps it was lost in shipping. For my hobbyist purposes this is a convenient tool to have and use with my DSLR in very cold or humid conditions.

12V powered dew heater heats up quick. Unlike USB dew heater, it should warm up better.The dew heater is long enought to cover my 128mm refrector telescope and has two on/off switch. One on the heater side, and one on the 12V plug in side. One that close to heater is just on/off, and the one that closed to 12V plug (to power) is on/off with temp. control. I can just setup right temp. and use other switch to turn on/off. Plug nicely to 12V out on my AC/DC battery pack.Due to the shipping, it came folded with creases, but hopefully from normal use, it'll be flattened.Appears to be havy duty material and well made.It may not compatible to some dew heater controllers which use RCA jack, but works for me since it has common 12V plug for power and has built in temp. controller.Good vlaue.