AudioQuest Pearl 1.5m (4.96 ft.) Standard to Micro USB Cable Solid conductors eliminate strandinteraction distortion. Pearl's solid LongGrain Copper allows a smoother and clearer sound than cables using regular OFHC (OxygenFree HighConductivity) copper. Pearl USB uses airfilled FoamedPolyethylene Insulation because air absorbs next to no energy and Polyethylene is lowloss and has a benign distortion profile. Thanks to all the air in FoamedPE, it causes much less of the outoffocus effect common to other materials. Precision goldplated plugs are carefully attached with the very best solder. Through choice of flux and metallurgy, AQ solder has been optimized to make a lowdistortion connection. USB (Universal Serial BUS) was established by a stalwart group of companies such as Intel, HewlettPackard, and Microsoft (just to name a few) in order to give the personal computing world a truly universal standard and means to connect devices such as hard drives, printers, cameras, and, more importantly to us, audio components.