pity ts.... luckily my car use normal 1.... RM 300 for whole car in brother..... my fren who working in brother and install it for me.... he told me that vkool just branded ..... better a bit.... maybe customer services good but i dont think it now cox wat ts faced it..... somemore he told me that the most important is ur car aircond, if u drive bmw, accord, those big car with good air con.... so u will feel cool when u on ur air con fast.... if u drive a kancil , vkool also cant help much...