Specification: (1)Flash Disk & SD/MMC/MS Card Reader. (2) INTERFACE: Support USB 1.0/1.1/2.0 Specification. (3) MEMORY CARD SLOT: SUPPORT SD/MMC/MS Memory Card.. (4) USB Mass Storage Class Specification. (5) Flash Optional: 128/ 256/ 512MB (6) No External Power Required, Powered Bus (4.5 to 5.5V) (7) Shock Resistance: 1000G( Maximum) (8) LED Indicator. (9) Hot Plug- and- Play. (10) Dimension: 80x 28x19mm (11) Weight: 26g. Features: (1) Combination of Flash Disk and 5- In- 1 Card Reader.. (2) Easy to Extant the Flash Capacity By Flash Card. (3) Convenient and Fast Data Exchange For PDA, Digital Camera, Mobile Phone. (4) Driver Free At Windows XP/ 2000, and Mac( TM) OS 9.1/ OS X.