Features: Brand New and High Quality PCI-E 4X 1 to 4 USB 3.0 Port Riser for BTC Mining Miner Multiplier Expansion Card Desktop Extender Four slots provide great scalability. The connector is inserted directly into the board and can be fixed on the chassis without any extension cable. PCI-E slot power solution without extra power cable. The slot only needs one cable, which is simple and convenient to install. Plug and play, no need to install driver Specifications: Main Control Chip: ASM1812 Bus Speed: 20Gbps Bus Port: PCI-E 4x Number of Ports: 4 x USB 3.0 Supported Operating Systems: for DOS, for Linux, for Windows XP / 7 / 8 / 10 Product Size: Approx. 120 x 62 x 18mm/4.7x2.4x0.7in Product Weight: 35g Package Size: 147x 125x 26mm/5.8x4.9x1in Package Weight: 95g Note: 1.Due to the light and screen difference, the item's color may be slightly different from the pictures. 2.Please allow 0.5-2cm differences due to manual measurement. Package Includes: 1 x PCI to Express to 4-Port USB3.0 Expansion Card