Use solar energy or Vehicle's electricity, No battery cost Aims to reduce Vehicle's interior temperature and improve ventilation Convenient to smokers Wind speed can be double when using vehicle's electricity Portable and easy to install Stylish, durable and water proof Switches to choose for solar energy and electricity Features: 1) Keeps your car cooler with solar powered ventilation system 2) Blows hot air out of parked car 3) Solar powered - need no batteries 4) Fits any car window 5) Protects expensive leather seats from weakening 6) Protects dashboard and interior 7) Keeps valuable items safe from hot conditions 8) Reduces air conditioning use and fuel consumption