Estone New 3 in 1 30Pin to USB Host OTG Connector Adapter Cable For Samsung Galaxy Tab Two ports with USB sign: Support USB flash disk, card reader, mouse, USB hard disk (Note: The hard disk must have external power, the disk format must be FAT32, can not read NTFS) The another USB port can connect the original charger to charge the tablet Sync support keyboard, mouse, U disk can connect to and external input Can charger for Galaxy Tab easily thought connecting external, charger Compatible with Samsung Galaxy Tab