Due to its design, USB cable has a normal maximum length of about 5 meters (16.4 feet), but you can get longer distances by using the CPA−UAM/UAF active USB extension cable from Kramer!

　　This is a bus−powered extension cable that can be used to increase the length of a device without any signal loss or potential performance problems. It contains active electronics, which boost the USB signal for maximum reliability and performance over extended distances. The cable operates as a self−powered extender, for use with USB cameras‚ printers‚ webcams‚ keyboard/mouse, etc.

　　True Plug–and–Play — No additional drivers needed.

　　USB 2.0 High Speed (480Mbps) Standard.

　　Construction — 1 pair 24AWG + 2 pair 22AWG + drain wire 24AWG, tinned copper braid.

　　No External Power — Takes power from the source.

　　Data Transfer Only — Not for charging.

　　Buffers Incoming & Outgoing Signal.

　　Compliant with USB 2.0.

　　CMP–c(ETL) Rated.

　　Varied Selection of Lengths — Available in versions of 25 to 65ft (7.6 to 19.5m).

　　应用

　　Interactive whiteboards

　　Web cams and partners