Interface: USB3.0 Transmission Rate: 5Gbps Power Supply: Micro USB Support System: for Windows, Mac OS, linux without driver installation, plugging and play. Function: Expand Computer USB Port 4 in 1 USB3.0 HUB, high-speed transmission, stable operation. 4 Port USB can be expanded at the same time, support multiple devices, no lag or delay. Plugging and play, compatible with multi-system. Novel appearance design, with bright blue light after power on. Packages: 1 X USB 3.0 HUB Note: 1. Please Allow 1-3cm Differs Due To Manual Measurement. 2. Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Please refer to the actual product.Thanks For Your Understanding.