Lens Heater + Broadband Didymium Light Pollution Reduction Filter HEATER: Prevents Condensation on your Lens. HEATER: Rapid heat with high-tech Graphene material HEATER: Three power settings: Low (35-45° C), Medium (45-55° C), and High (55-65° C) HEATER: 1.5m (4.9ft) Power Cable. USB port design :Connects to a Camera Port or Power Bank. FILTER: Reduces Light Pollution for Crystal Clear Night Skies FILTER: Nano Multi-Coated FILTER: Optical Glass Filter FILTER: Double Threaded Frame Allows Filter Stacking / Hoods & Caps Includes Filter Storage Case