4 gb cap.; 3 x 3/4 x 1/4 in.; security: biometric recognition software, password storage and 192-bit tdes encrytion; unique sliding design protects the usb port; plug n play no need to restart; high speed usb 2.0 (compatible with usb 1.1) transfer rate up to 480 mbs; pc compatible: windows 2000/me/xp