No external power supply required. 4-port USB3.2 Gen1 expansion card, 2-port Type-C + 2-port Type-A. 4-way power supply. Made of high-quality materials. Bus speed: 5Gbps. Bus specification: PCI-E2.0x1 Interface type: USB3.2 Gen1x4 Interface specifications: USB3.2 Gen1 TYPE-C*2, USB3.2 Gen1 TYPE-A*2 Interface speed: 5Gbps Interface speed: about 390MB/S Installation conditions: PCI-E X1, X4, X8, X16, slot Installation conditions: Free PCI-E X1, X4, X8, X16, slots Working temperature: 0-60℃ Storage temperature: 0-80℃ Input voltage: DC12V Input current: 4A Driver support:for WIN7,8,10,11.Linux,XP Note:Due to different production batches, there are differences in printing/appearance, which does not affect use. Colour:Black Material:PCB+Metal Package Contents: 1 * PCIE Expansion Card 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.