This is for a multiplier, one connect to motherboard 9pin (10pin) port, split to 2x 9-Pin(10-pin).; High Speed Data Hub & Great Compatibility: Supports Transfer Speeds up to 480Mbps (USB 2.0 ), 12Mbps (USB 1.1 ).; Compatible with Windows 10/8/ 8.1 /7 / Vista / XP and Mac OS X, Linux and Chrome OS.; Plug and play, no driver required.