internet web related products Specification]： 1) Dimensions (L x W x H): 55.77 x 25.550 x 8.80mm 2) Weight: 3) Available capacities: 64MB, 128MB, 256MB, 512MB, 1GB 4) Hi-speed USB 2.0 certified 5) Compatible with USB 2.0 6) For Mac and PC, no driver required 7) No external power required 8) Functions as hard drive 9) LED indicates power, read/write 10) Automatic system detection as removable disk 11) Shock resistance: 1,000g 12) Min. data retention: 10 years 13) 3 years warranty 14) Fashionable design 15) Pretty look, silver plastic casing, reasonably small size and smooth feeling 16) Can be used with Macs and PCs and requires no external power