JacobsParts USB 3.0 Front Panel Expansion Bay to 20-Pin Motherboard Header Cable (2-Port) Add two USB 3.0 ports to the front of a desktop computer. Fits into a 3.5" drive bay. Compatible with all operating systems, no external power required. Requires an open USB 3.0 header on the motherboard. Screws Included, Cable Length: 50cm