Custom Usb PV-012PV-012PV-011 Specification: Capacities1GB,2GB, 4GB, 8GB, 16GB, 32GB,64GB Operating Temperature32°F to 140°F ... speed :12-20M/sSimple just plug into any USB portConvenientsturdy loop supports most key ringsHandycompact sizeGuaranteed1-year warrantyOperation ... Windows Vista, Windows 7 or aboveAccessoriesManual ,cd drive, USB cable, lanyard, keyring (optional)Data retention 10 years ...