New Gen2 FANZ kit: quieter, fitting all masks (with open ventilation). Kit can be installed inside the goggle or on top. Why struggle with fogging when you can push it away? This easy to install fan system will give 12 hours of performance on a standard 9 volt battery. Very quiet and also has a very slim profile. This will fit most masks that have an open ventilated top portion. This fan kit will be perfect for all players looking for re-assurance when the temps heat up.