The Sabrent SBT-U2HA 4-Port USB 2.0 Hi-Speed Bus-Powered Ultra Slim Silver Hub is a harmonica-shaped USB hub that allows you to add up to 4 peripherals to your computer. The thin, lightweight design with hide-away cable makes this hub a great travel companion to expand one USB 2.0 port into four. Especially great for notebooks which come with only a few ports in an era when you need to attach many USB devices at once, such as a printer, card reader, cell phone, iPod, thumb drive, mouse, keyboard or an external hard drive. Achieve full 480Mbps on each port or daisy chain multiple hubs to a maximum of 127 devices. Fully backwards compatible with the USB 1.1 products. Included LED indicates activity.