Built in over heat protections circuit, with temperature not exceeding 50 ℃, ensuring the of the equipment and lens Supports USB C / USB portpower supply ( 5V / 1-2A), compatibility with mobile power such as and camera batteries, with low power consumption Using high-precised temperature control chips and uniform heating films, effectively fogging caused by temperature differences inside and outside the lens, and maintaining lens clarities It is also suitable for optically equipment such as sports cameras, UAV lenses, telescopes, microscopes, diving and more It is a practical anti fog tool for outdoor photography, astronomical observation, scientific research and investigation Integrated lightweight design, controller can display real-time temperature, 3-speed temperature control mode, user can operate with single hand without affecting photography