The 49' (14.93 m) TetherPro USB 2.0 Active Extension Cable (Black) from Tether Tools allows longer tethering distances without worrying about signal errors or corrupt data transfers. With this cable, signals and data transfers going in and out of the cable are buffered to ensure consistent signal quality, meeting USB's highest electrical and timing specifications.
Passive cables over 16' (4.88 m) in length, for the purpose of data transmission, may result in signal errors or noise and are not recommended. Up to four active USB extensions and one passive 15' (4.57 m) USB can be daisy chained, thus avoiding any drop-off in signals.
For longer distances, you can simply insert additional active extension increments into the chain to achieve the needed distance.