FunctionUsed for data transmission and charging expansion widely used on Printer Scanner Fax Machine etc. Easy to UsePlug and play no software or power required a very convenient way to connected computer and printer. FastUSB 2.0 design transfer speed up to 480mbps; charging current up to 2A. DurableNickel-plated USB plug enhanced signal transmission stability oxidation resistance corrosion resistance. MaterialMade of high quality metal and PVC materials good electrical conductivity durability and easy to use.