MULTI-PURPOSE:With hot and cold switch.This car heater is not only ideal for defrosting/demisting window&windscreens.But also can be used as a cooling fan to give you wind in the summer.You just need to change the switch,then the hot air or cool wind will come out immediately as your needs.This product is A high-power electrical appliance for vehicles,and its working current is relatively large (about 12.5a).It cannot work for A long time (40-60 minutes).. . EASY&EFFICIENT:Very convenient and easy to use!!!Just plug and play.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. . Fast Heating:Novel design air outlet offer high effective heating,which can quickly clean the frost,fog,mist on your vehicle's windshield,ensure your driving safety.In the process of use,if the machine starts up for a few minutes,it will automatically stop.This is caused by the insufficient current protector of the cigarette holder. . Innovative Design:The heater has a handle and can be held.Ideal for in-car,camping&caravanning.Fit For all 12V Vehicle Cars.This product is a high-power electrical appliance,the plug should be inserted tightly when used to maintain a good electrification condition,and do not touch the cigarette end metal parts with your hands to avoid burns when the plug is pulled out after long use.