Usb 20 stick memory size 8 gb read speed 15 mbs write speed 5 mbs backward compatible with usb 11 memory type flash memory dimensions 36 x 36 x 11 mm series emtec smiley world additional information read and write speed may vary depending on the capacity compatible operating systems linux 26 mac os windows 2000 windows 7 windows 8 windows me windows vista windows xp fastener with cap