The JT 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 features a 3-way switch to either blow air in or draw air out of your goggle-you no longer have to switch the battery direction to control the air flow. Built to be shock proof as well as water resistant, one AAA battery delivers over 30 hours of operation. Works great for players that wear glasses. The Vortex Fan is much easier to install and disassemble for cleaning and fits all JT Elite & Spectra goggle systems. Requires one AAA Battery, included.