【Hot and cold wind protection】The product has the function of alternating hot and cold wind to meet the defrosting/defogging function of windows and windshields. Whether in the car or at home, it is a good choice. 【Less noise】The silent fan is quiet and makes no noise while working, creating a good environment for you. 【Small design】The product measures only 135 x 110mm, portable and convenient to install. It can be installed on the bottom of the seat, next to the foot or any position in the car 】 Suitable for all 12V-24V vehicles such as cars, trucks, SUVs. This heater has a thermal shutdown protection that will automatically shut off when the temperature is too high to ensure your safety. 【Great Gift: It can be a good gift for your lovers, fathers and friends on birthdays, festivals such as the sanctification or Christmas Day. p>