Value B00509 is an active USB extension cable for connecting a USB device to a computer when it needs to sit farther away.
At 15 m long, it extends the connection with a USB Type-A male plug at one end and a USB Type-A female socket at the other. It supports USB 2.0 and has a built-in signal amplifier; the specified data transfer rate is up to 480 Mbit/s.
Plug and Play operation and USB power mean it needs no external power supply. Stated compatibility includes Windows, Mac, and Linux.