Heating and Cooling Features: This windshield defogger can quickly remove haze or frost from the car windshield by heating the air. The car heater can also be used as a fan to cool your car in summer, keep you cool in summer and warm in winter. Fast heating: With high quality exhaust fan, you can heat the air quickly without waiting for the engine to warm up. Smart design, with cigarette lighter socket, built-in fuse, automatic shutdown protection, safer to use. Two modes: This car fan has two modes. The switch displays fan or heat, high temperature heat output for heating can ensure rapid heating and convenient warming effect. Convenient to install: just plug it into your 12 V cigarette lighter socket and turn it on, the base can be placed on the non-slip mat, or installed with double-sided adhesive. Wide applications: ideal for long journeys, the heater fan defroster is widely used in cars, trucks, vehicles, etc.