EAZY2HD USB Extender Over Single CAT5E/CAT6 Ethernet Cable up to 60m, USB over CAT5E/6 with 4 Ports USB 2.0, Supports Two Webcams Work Synchronous,Plug and Play,Windows/MacOS/Android/Linux

Our IT guy told me to get this. It makes my wireless mouse work on a CCTV system which is located about 20 metres away.

Well, this is a "as it says on the tin" moment. Plug it in. Power the remote end. Everything works a treat over 20m of cat6 cable. Rock steady usb devices. Brilliant.