Neewer Usb Lens Heater, 12 /300Mm Lens Warmer With Fpc Fast Even Heating Tech For Dslr Camera Lens Telescope Astrophotography, 3

?Enhanced Heating With Fpc Technology? Designed With Fpc (Flexible Printed Circuits), This Lightweight Yet Durable Lens Heater Uses Polyimide Films As The Insulator For Reliable Dielectric Performance, And Thermofoil As The Heating Element For Improved Thermal Conductivity And Higher Heat Transfer Efficiency To Quickly And Evenly Warm Up Your Lens. Note: The Lens Heater Is Bendable But Cannot Be Folded | ?Effective 12 /300Mm Heater Length? Eliminate Dew, Fog, And Condensation With Our Specially Crafted Lens Warmer During Cold Weather Photography. For Optimal Performance And Even Heating, It Is Recommended To Use On Lenses Or Telescopes With A Circumference Of Up To 12 /300Mm And A Diameter Of 96Mm | ?Safe 5V 2A Usb Power Supply? Through The 6Ft/1.8M Usb Cable, The Lens Heater Can Receive Power From Any Usb Power Source With A 5V 2A Output And Feature Overheating/Overvoltage Protection For Safe Use. A Regulator Offers 3 Temperature Levels (High: 125.6