for macbook pro charger used in car 1.comfortable touch 2.portable,OEM/ODM 3.long life time,factory price 4.assured quality Hongkong Waete ... , PSP, PMP, PDA, NDS, NDSL, NDSi, etc.Working conditionLoad effect: 3%Efficiency: ≥85%Stability precision: ±5%Storage condition: -40°C---+ 60 ... have any other questions, please feel free to contact us! for macbook pro charger used in car