... .Not only a USB travel charger ,but also a card reader ,mobilephone pandent etc.Specification BrandSmartcableModel I modelProduct description ... multifunctional USB charger ,travel charger with micro SD card readerUSB port USB 2.0Power 5V USB portVoltage input ... :DC4.75-5.25VCharging Current 5000mA max Card reading TF(micro SD) card Operation system windows 2000/XP ,Vista ,Mac9.2,Mac ...