509® Anti-Fog Goggle Fan for Snow Goggles, Black

Designed For use with 509™ Sinister and Aviator goggles, this Anti-Fog Fan installs directly into the goggles and provides airflow as needed to exhaust warm, moist air and prevent fogging. SETTINGS: Off, On, and Auto, which detects fog and automatically turns the fan until the moist air is evacuated. POWER: single AAA battery (included)