The Star Tech USB (Universal Serial Bus) 2.0 4-port Hub provides the ability for multiple high-performance USB (Universal Serial Bus) 2.0 devices. It supports high-speed, full speed, & low speed USB (Universal Serial Bus) devices such as scanners, cameras, joysticks, keyboards, mice, speakers, etc. The unit can operate in self-powered mode (drawing power from the USB (Universal Serial Bus) bus) or by using the included power adapter. It is compatible with both PCs & Macs with USB (Universal Serial Bus) capabilities.