Fit nicely into my car air vent control, I've disabled the vent control anyway hehe
http://i42.photobucket.com/albums/e346/papagoines/WLG7965/AfterConversion/Addons/Accessories/I110600261-DigitalVoltMeter.jpg
Did anyone tried to DIY a cool air vent before?
like those advertise in newspaper. It is suppose to cool down the cabin tempreture when the car is park under the hot sun.