Features: 4-Port or 8-port USB hub splitter with independent power switches. GL3510 main control chip, strong performance, USB3.0 high-speed transmission, downward compatibility with USB2.0. Suitable for most of the USB product on the market, such as phone computer PC, tablets, keyboards and mouse, USB drive, hard disk, card reader, USB Fan, USB Lamp and more. With DC3.5x1.35mm power supply port, support hot-swappable, insert and use, no driver required. Small in size and lightweight, portable enough for work and travel. Specifications: Material: Aluminum-alloy Housing Color: Silver Gray Type: 4-port, 8-port(optional) 4-port: about 103x57mm/4.05x2.24inch Package Includes: 1x Multi-port USB3.0 Hub note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitor resolution.