Rugged industrial-grade USB 2.0 isolator (backward compatible with USB 1.1 ) ^^ 5000Vrms isolation (per UL 1577) protects your computer from ground loops, transient surges, remote lightning and spikes ^^ Plug and play (hot-pluggable), no software drivers required ^^ Low and full speed data rate: 1.5M bps and 12Mbps (auto-sensing and self-adjusting). Upstream short-circuit protection and class 3A contact ESD protection ^^ External 5VDC (optional) for high power-consumption applications, e. g. a USB scanner or USB printer