This tiny USB flash drive weighs less than an ounce. Doubles as a paper clip, conveniently attaching to papers or business cards so you can mail it or distribute electronic data easily. Cap-less design resists water, dust and static. Compatible with all USB ports. Connector/Port/Interface: USB 2.0; Storage Capacity: 4 GB; Weight: 0.96 oz; Operating System Compatibility: Linux?: 2.6 and Later; Mac? OS X; Windows? XP, Vista?, 7, 8.