SIIG 49 Feet (15M) USB 2.0 Active Repeater Extension Cable Type A Male to Female, Daisy-chainable (JU-CB0311-S1) Supports data transfer rates up to 480Mb/s Supports daisy chain connection  up to 60m max (4 cables) with an optional external power adapter (not included) Built in power adapter jack for supporting power hungry USB devices Plug-n-play, no driver installation required Fully shielded for error-free data transmissions Built-in over current protection to protect the connected device and repeater itself from unforeseen power surge