Please note that this USB Hub is designed to extend your computers connectivity options with devices that consume minimal power. Mice, keyboards, USB flash drives, card readers, etc. will work fine when the hub is being powered by USB Note: When using devices that require more power please attach an AC adapter to the hub to provide sufficient power capable enough to meet your connectivity needs Plug and play; no driver required 7 Port USB Hub - This hub splitter comes with 7 USB 2.0 ports, which allows you to connect 7 USB devices to a computer at the same to achieve synchronization. compatible with u disc , small usb gadgets , card reader , router , printer , USB Designed with 7-ports, this compact USB high-speed hub is small enough for travel, and capable enough to meet your connectivity needs.