... voltage protection 3.small enough to carry around Specification of dual usb car charger: Input: DC12V-24VOutput: DC ... current charging, pressure limiting,lower risks of over-current,overheat and short-circuitScope of application: PSP, PMP, PDA, digital cameras, ... ipod, iphone, mobile phones, sansa, zen, zune, blackberry, NDS, NDSL, NDSi,ZEN,ZUNE,MP4 etcDetailed picture of ...