The AutoDrive 12V Window Heater, Fan and Defogger helps circulate the air in your vehicle and defog the condensation on your windshield.  This defogger can be used in all 4 seasons to keep your driving view clear and adds a boost to your heater or air conditioning.  If you dont have A/C the fan can be used independently without the heater and will help keep you cool and circulate fresh air and direct it towards you.  In the winter, use the heat function with the fan and it helps move air from your vents and directs warm air through the vehicle interior. Input: DC12V, 12.5A(Max) Wattage:150W(Max) Includes ergonomically designed retractable handle and removable dashboard stand. Works fast in rain, snow, or fog to heat your front or rear windshield without having to wait for the car engine to warm up. *This fan will not defrost a windshield on its own power. It will not provide enough power to heat the interior of the vehicle on its own.  Use it with your vehicles defrost function, to clear windows, use it as a fan to circulate fresh air in warm weather. Turn on the heat function in cool weather to aid in warming up your vehicle or windows.