Usb 20 stick memory size 8 gb read speed 15 mbs write speed 5 mbs backward compatible with usb 11 dimensions 40 x 25 x 25 mm materials rubber silicone series emtec m series manufacturers warranty 5 years additional information read and write speed may vary depending on the capacity compatible operating systems linux mac os 9 mac os 10 windows 2000 windows 7 windows vista windows xp