Plug and Play:USB to RJ45 Extension Adapter Self-powered, no external power source is required.plug and play,no driver needed. Distance and adapters may affect the performance of some devices down to USB 1.1 speed.USB extender input Interface :USB 2.0,compatible with USB 2.0,USB 1.1. Important: standard above CAT5 copper wire,the core of the copper wire should be 0.5mm,if the USB harddisk cannot work,it might be the low power,you should power the harddisk with double head USB charger cable. Widely Use:This USB 2.0 to RJ45 Extender Over Cat5/Cat5e /Cat6 Cable Connector Adapter is ideal for use with USB camera, printer,web cam,keyboard/mouse extensions,and other USB devices. ? Good performance:This USB to RJ45 extension adapter connects USB devices up to 150 feet away to your computer by going over Cat-5/5e/6 patch cable(NOT INCLUDED in Package),Overcome the length limits of USB cables.Please note:The maximum distance between this USB to RJ45 extension adapter and the computer can reach 150 feet, but more than 30 feet need to be completed with high-quality network cable! Otherwise it will lead to instability, ordinary network cable under 30 feet is enough!.