Multifunction: with hot and cold switch. This car heater is not only ideal for defrosting/demisting windows and windshields. It can also be used as a cooling fan to give you wind in summer. You just need to change the switch, then hot air or cool wind will come out immediately as you need. If you have any concerns, please check the instruction manual, please feel free to contact us at any time. Easy and effective: very practical and easy to use. Just plug it in and use it. Instant heating, automatic overheating protection. You can heat the atmosphere in your car without having to wait for the engine to heat up in 3 seconds. Effectively allows you to defrost or defog your window quickly so you can hit the road and arrive at your destination. High Quality: Made of high quality material and premium pure copper, our car heater is more durable than others. It has large air outlets, long transmission distance and wide range, which is more energy efficient with low consumption. Smart design: compact size, portable and convenient to install. A rotating bracket is designed for free adjustment, convenient and practical. It comes with a rotating stand that can be used for easy adjustment and steering like a car air vent, so you can adjust it to your preferred angle. Wide range of use: car heater suitable for winter cars, camping, travel and warmth. Portable and efficient, it can be heated quickly and easily.