1.)Works without power adaptor with low current devices.
2.)Compatible with  Windows, Mac OS or Linux systems.
3.)1 upstream and 4 downstream USB port.
4.)4-port USB 3.0 hub with super speed transfer rate up to 5Gbps.
5.)Backwards compatible with USB 2.0 & 1.1.
6.)Supports hot swap.
7.)Built-in over-current protection to protect both connected devices and the hub itself from unforeseen power surges.