RS PRO 4 x USB A Port Hub, USB 3.0 - USB Bus Powered This USB hub from RS PRO has four ports for connecting up to four USB 3.0 devices to your computer. It's a handy way to increasing the number of USB ports available when you need to support multiple devices. The hub is compatible with both USB 3.0 and USB 2.0 specifications and supports auto-switching between self-powered and bus-power modes. This means it can pull power from either an AC outlet or the computer. It's compatible with Windows XP or later and macOS X, and it supports low-speed, full-speed, high-speed and super-speed transfer rates up to 5 Gbit/s. This makes it compatible with multiple devices, regardless of the transfer speed. It's FCC (Federal Communications Commission) compliant for low radio frequency interference. When connected to your computer, this USB hub can be used to charge most smartphones, as well as devices such as MP3 players and USB-powered torches. Features and Benefits - USB hub - Four USB ports - Supports auto-switching between self-powered and bus power modes - USB A connection type - Compatible with USB 3.0 and 2.0 - Supplied with an AC outlet for charging devices from the mains - Compatible with Windows XP or later and macOS X - Complies with FCC (Federal Communications Commission) requirements for radio frequency interference