One motherboard 20P male connector available for 2 more USB 3.0 port. SATA power connector available for some high current consumption peripherals or 3 above devices at the same time. Premium material and workmanship, high quality and long lifespan. Specification: Material: PCB Color: White Main Chips: RENSAS D720201 + GL35XX Interface: USB3.1 TYPE-C + 4 Port USB3.0 TYPE-A + 19PIN Header Support System: Compatible with for XP, for Vista, for 7, for Linux, for 8/8.1/10 Size: 12 x 8.2 x 1.8cm/4.7 x 3.2 x 0.7in Package Weight: .90g/3.2oz Package Contents: 2 x PCI-E to USB3.0 Expansion Card 2 x Driver CD. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Features: 1. Reversible USB-C/Type-C connector design (plugs in both ways) allows you to conveniently connect cable in any orientation 2. Supports up to 7 USB 3.0 devices: 1 USB C + 4 USB A 5 port hub and 1 internal 20pin connector for expanding another two USB 3.0 port. 3. 4 external USB 3.0 Type-C female connectors.. 4. Supports simultaneous operation of multiple USB 3.0/2.0/1.1 devices.