Specification:

Standard SD/MMC size: SD card size (32 x 24 x 2.1mm)
High quality: all of Samsung A+ class flash chip
High speed USB disk: standard USB 2.0 speed (R/W: 9.5MB / 8.5MB /s)
High speed SD card: almost same speed as 80X
SD card (maybe different from various devices)
Thinnest: the thinnest USB disk in the word (only 2.1mm), easy to be stored in wallet.
Capacity: from 64M to 2G