GDD-FAN1 is specially designed for many of Gicren's devices when the power dissipation is large. It integrates two JST-PH2.0-9Pin connectors which are distinguished by the name of “Upstream” and “Downstream” (Warning: the differences between them are marked on the silkscreen). Visit here for updated documents of Gicren’s products Technical support：gicren(at)outlook.com For any technical support or suggestion, please kindly go to our forum.