The Vortex II™ fan features a high-speed motor, which silently extracts hot humid air from inside the goggle and exchanges it with cool fresh air in seconds! The Vortex II¿ features a 2-way switch to eiteher blow air in or draw air out of your goggles. Built to be shock proof as well as water resistant, one AAA battery delivers over 30hrs of operation. The Vortex II¿ fan is easy to install and disassemble for cleaning and fits all JT® Elite¿& Spectra¿ goggle systems.