ITEM NAME:2 USB3.0 Female Back Panel To Motherboard 20pin Header Connector Cable AdapS Gw.Connectors:USB 3.0 Female (x2), 20 pin motherboard. This cable (plus bracket) provides 2 external USB 3.0 ports that connect to the motherboard. USB 3.0 Back Panel Expansion Bracket to 20-Pin Header Cable (2-Port).