Built in over heat protections circuit, with temperature not exceeding 50 ℃, ensuring the safety of the equipment and lens It is also suitable for optically equipment such as sports cameras, UAV lenses, telescopes, microscopes, diving mask and more. It is a practical anti fog tool for outdoor photography, astronomical observation, scientific research and investigation Using high-precised temperature control chips and uniform heating films, effectively preventing fogging caused by temperature differences inside and outside the lens, and maintaining lens clarities Integrated lightweight design, controller can display real-time temperature, 3-speed temperature control mode, user can operate with single hand without affecting photography Specially designed for lenses of different diameters (such as 49-95mm) and telescope eyepieces, with multiple installation methods and a tight fit