Safety-designed interface cable to connect the optically-isolated serial interface port of Scopemeter or Power Quality Analyzer to a standard USB-interface on your PC. Optical isolation allows you to float your instrument at mains voltages or beyond*, while being connected to your PC.Fluke OC4USB USB Interface Cable features:Supports the Fluke 120 Series, Fluke 190 Series ScopeMeters, as well as the 43 and 43B and 430 Series Power Quality analyzersSupports Windows Vista/ XP/2000/Me/98 SECable length 1.5 m (4.9 ft)