PRO TANLE USB Lens Heater 290mm/11.4in Camera Len Warmer 3 Temperature Levels Fast Even Heating for DSLR Camera Lens Telescope Astrophotography with Controller Features: 【Camera Lens Warmer】This lightweight lens warmer utilizes graphene material to achieve enhanced thermal conductivity. Enjoy quick and even warming of your lens for optimal performance. (Please note that while the lens heater is bendable, it should not be folded.) 【290mm/11.4in Efficient Heating Coverage】Say goodbye to dew, fog, and condensation during cold weather photography with our specially designed lens warmer. With an effective heating length of 290mm/11.4in, this camera lens heater is ideal for lenses or telescopes with a external diameter of 80-110mm. 【Secure 5V USB Power Supply】Power up your lens heater with ease using the included 1.5m USB cable. Compatible with any USB power source delivering a 5V 2A output, this lens heater can be powered by power bank, USB power adapter, laptop, etc. 【3 Temperature Levels】Our lens heater for camera supports 3 levels of temperature adjustment(High: about 60℃; Middle: about 50℃; Low: about 40℃) to suit various environmental conditions. 【30min Auto Shutdown】Long press the power button for 3s to activate 30-minute timer shutdown function after turning on the lens warmer and the indicator light will flash. Short press the power button, the indicator light will stay on continuously, indicating that the timer shutdown function is not activated. Specifications: Material: graphene Power Supply: 5V 2A USB Heating Length: 290mm/11.4in Compatible Lens: external diameter 80-110mm Cable Length: about 1.5M Temperature: High, Middle, Low Item Weight: about 49g Packing List: 1 * Lens Warmer 1 * Carry Bag