Fog doesn't stand a chance with our bestselling 509 Kingpin Ignite Goggle featuring heated lens technology derived from the same science used in military aircraft windshields. Simply push a button and the lightweight, strap-mounted rechargeable lithium-ion power pack quickly heats the entire inner lens surface to 104�F. The system features a 2-minute mode or 'always on' mode, along with a continuous runtime rating of up to 5 hours at max temp for all-day clarity. Features: Ignite heated dual lens technology Sonic welded, IP57 rated water & dust resistant power pack Thermal conductive transparent ITO (Indium Tin Oxide) heated lens Strap mounted rechargeable lightweight 7.4v, 2200mAh lithium-ion power pack Lightweight rechargeable power pack & charging cable Single button ignition: 120 second mode & Always on mode 104�F maximum heating temperature 4-5 hour continuous max temp runtime Audible & LED status indicators Specifications: Style: Heated Materials: Thermal conductive transparent ITO (Indium Tin Oxide) Weatherproofing: IP57 rated Clear Lens - Cloudy, Low Light Photochromatic Polarized Smoke Tint - Partly Sunny, Adjusting Tint