Brand N/A Model 4G USB Flash Drives Quantity 1 Color Black Material Rubber + aluminium alloy Capacity 4 (actual capacity: 3.2~3.8GB) GB Data Interface USB 2.0 Read Speed About 10 MB/s Write Speed About 3 MB/s Other Features Without indicator light; Actual storage: 3.2GB~3.8GB; Connector: USB connector it works without driver support hot plugging. Applicable models: several kinds of PC and computers Macintosh PowerBook iMAC or ibooks. Operating system: Windows 7 / 95 / 98 / XP / ME / NT Vista Linux UNIX PC - DOS DR DOS Mac OS and OS / 2 etc.; Electricity: USB bus power supply (4.5V~5.5V); Working current: Packing List 1 x USB Flash Driver disk