*USB cellular phone SIM card reader / writer. *Supports most cellular phone SIM card. *Read, edit, backup cellular phone directory and SMS. *Be able to copy the content of one SIM card to another. *Information safekeeping. *Simply plug it into USB port, plug and play. *Small, lightweight. *Compatible with USB 1.0, 1.1 and 2.0. *System requirements : Windows 98 / ME / 2000 / XP *Installation CD driver included.