What is the PTC Fan:Positive temperature coefficient (PTC) thermistor and triple frequency harmonic filter can reduce zero voltage when nonlinear resistance is used to prevent ferroresonance.

It is ideal for defrosting or de-misting window and windscreens.

This heater or fan will blow instant heat or cool air.

It will warm your car within seconds.

Easy operation,just plug it into your 12V vehicle's cigarette socket and turn it on.Effectively allows you to defrost or demist your window quickly so you can get on the road and get to your destination.

Change the switch and the hot air or cool fan come out immediately.

This heater is ideal for defrosting or demisting window and windscreens.Also can be used as a fan only to cool you down in the summer.Portable Car Defroster-With 180 degree rotate supporting holder and a convenient handle .

Compact size, portable and convenient to use.Low energy loss, low noise, no fire.

Wide application-Instant heating, automatic overheat protect.so you'll always have the heater/defroster within.They are widely used at car, truck, vehicle, air conditioner and other commonly used appliances.Fit for all 12V Vehicle Cars ATTENTION PLEASE!!!The vehicle should be around 15amp, the heater will worked fine, but if your voltage is much less than 15amp, the heater maybe stop working.

If so, please adjust your vehicle voltage.