Usb 20 stick memory size 4 gb read speed 8 mbs write speed 25 mbs backward compatible with usb 11 memory type flash memory material plastic series verbatim store n go manufacturers warranty 2 years weight 86 g additional information read and write speed may vary depending on the capacity compatible operating systems mac os 9 linux 24 windows xp windows vista windows 7 windows 8 windows 10 fastener retractable usb plug