Doesn't hold much power without having to buy an AC adapter that plugs into the wall, defeating the purpose of the cord length when it needs to be plugged in.
Pros
HIGH SPEED CABLE: The active extender is bus powered with a built-in signal amplification chipset to allow Hi-Speed USB 2.0 to run longer than a traditional USB extender. Enjoy high speed USB 2.0 data transfer up to 480Mbps.