Net Weight: 56g Size: Approx. 5.2cmx1.8cmx1.1cm Length of chain: Approx.10cm Writing Speed: 6M/S Reading Speed: 15M/S Capacity: 128MB( Not 128GB ) Color: random Metal material and high quality. Hot plug & play Compatible with USB 2.0 Compatible with PC, Notebook, MAC Light weight and foldable Modern design, make it elegant Store your pictures, videos, and songs and any kind of data. Easy to carry and not easy to lose for its innovative shape Support Windows 7 / 8,Windows Vista,Windows 2000,Mac OS X, Linux. Easy to read and read in high speed ,No need drive/power supply only plug in. Small style and fashionable products, as an impressive gift for your beloved, friends or even customers. Package Included: 4 x Flash Memory Stick Note: Random color, don't accept the specified color. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.