The cooling fan quickly exhausts air from the cover to prevent lens fogging and relieve heat buildup. Good ventilation keeps the face cool during intensity activities such as workouts. The fan has a builtin 600 mAh battery and charges via a TypeC port. The ergonomic design fits the face securely and minimizes light leakage. Compact, integrated design with practical power and ventilation for daily use. Key specifications and features Battery capacity: 600 mAh Charging interface: TypeC port Fit: Ergonomic design to reduce light leakage and provide comfortable wear Function: Active cooling and ventilation to prevent fogging and heat buildup Use scenarios During intensity workouts or cardio sessions, where heat buildup and lens fogging can affect comfort and visibility In hot environments or extended wear periods, such as work or daily activities, to maintain ventilation and facial comfort For prolonged use in warm climates or locations with limited airflow, helping to keep the face cool and the view clear