4GB Sandisk-Cruzer Micro USB 2.0 Retractable PenDrive Retractable USB connector Brilliant amber LED U3 smart enabled. Loaded with U3 programs: CruzerSync synchronization software, SignupShield password manager, SKYPE, AVAST antivirus software Hi-Speed USB 2.0 certified (backwards compatible with all USB 1.1 ports) Compatible with Windows 2000, SP4 and XP. Certified Windows 2000 and XP