This is made for paintball goggles that are also in use for many airsoft CQB games and limited items at Airsoft Extreme... "The Jt Vortex paintball 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 2-way switch to either blow air in or draw air out of your paintball goggles.

Built to be shock proof as well as water resistant, one AAA battery  delivers over 30 hours of operation. The Vortex Fan is easy to install and disassemble for cleaning and fits all JT  elite & Spectra paintball goggle systems. Battery included."