Easy and Efficient:Just plug and play, plug it into your car's cigarette lighter socket and switch to heat or fan. Instant heating, automatic overheat protect. You can heat the atmosphere of your car without having to wait for the engine to warm within 60 seconds. Effectively allows you to defrost or demist your window quickly so you can get on the road and get to your destination. CAR COOLER & HEATER:2 In 1 Heating and Cooling Function allows you to feel warm in winter and cool in summer. The defogger can quickly clear mist or frost of the car windshield by heating the air. It can also be used as a fan to cool you on a hot summer day. Keep you cool in the summer and warm in the winter. Installation method:choose a good product placement, double-sided tape on the bottom of the product and then glued to the selected location on the car, the product can be rotated 360 degrees, 60 degrees up and down, the choice of suction cup bracket can be fixed in the front glass or sunroof glass anywhere to use HIGH QUALITY DESIGN:so the heater is not easily damaged. The thicker copper long cable will not heat up during use and will not damage your car battery. With its excellent design and high quality cable, there is no weak link.; Wide Application:Widely used at car, truck, vehicle, air conditioner and other commonly used appliances.Suitable for all 12V vehicles in the car, camping and travel，de-fogging/defrosting in the winter and Keeping cool in summer. Must use the original cigarette lighter to charge.Very suitable as a gift for your family or friends.