High-Speed 4-Port USB 3.0 Compact Hub Adapter w/ On/Off Switch USB Expansion Hub for PC Laptop (Black) Contains 1x High Quality High Speed 4 Port USB HUB Splitter Adapter USB Expansion with Individual On/Off Switch for PC and Laptop Computers. Allows connection of up to four separate devices all attached to a single hub. Ideal for use with laptops, tablets, and other devices with a limited number of available USB ports. Features hot swap technology, you can attach or detach USB devices even when the computer is on. IT also supports high-speed data transfer solution between components. Compatible with Windows 2000 / XP / VISTA / Windows 7 / MAC OS 9.X / 10.X / Linux system. Used for connecting peripherals such as USB mice, USB Portable Hard Drives, USB CD-R/RW or DVD-ROM drives. Designed with on/off switch that allows you to choose which USB devices you want active and which can be turned off without removing from the hub. With plug-and-play installation, no need for special software.