USB Multi port Expansion: add 4 USB 3.0 ports to your PC, desktop or computer for attaching USB stick, wired keyboard, mouse, card reader, external hard drives and other USB peripheral; Extra ports without messy cords on the desk; Plug and play, easy setup. Extra Durability & Ultra Extension: sturdy, robust and solid aluminum housing, 4.9ft extension long cord reaches your rear or bottom USB port from your PC without leaning over your body. Widely Compatible with Windows, Mac OS X, macOS, Linux systems; Backward compatible with USB 2.0 / 1.1. ; high speed usb hub (up to 5Gbps) for MacBook, MacBook Pro/mini, Ultrabooks, Surface Pro, iMac, Surface, XPS, PS4, PS5, thumb drives, mobile HDD, Bluetooth transmitter, Raspberry pi controllers, security camera DVR system, etc. Special Notes: 1. this hub is not recommended for charging; 2.wireless devices may suffer from possible USB 3.0 radio frequency interference; 3. external hard-drives should be connected to an external power source ( devices connected to the hub should not exceed a combined current of 5 volts 900 mAh.)