Usb 20 stick mini usb stick memory size 8 gb backward compatible with usb 11 dimensions 24 3 x 12 2 x 4 6 mm material zinc alloy special features waterproof dustproof shockproof certificatessafety ce fcc weee rohs kcc bsmi manufacturers warranty lifelong weight 26 g compatible operating systems windows 8 windows 7 windows xp windows vista windows 2000 mac os linux fastener retractable usb plug colours silver plated gold plated