The Rover series of USB extenders use patented "ExtremeUSB" technology to 100% transparently extend the range of USB connections up to 50m. No external power is required. Extension is via Cat 5/6 grade twisted pair wire.
The Rover 1650 offers simple point to point extension. The Rover 2650 provides 2 x USB inputs at the remote end.
Please see the Documents section below for more information.