Product Description Upgrade one port to four ports Quickly add up to four devices with the Sabrent 4-Port USB 3 0 Hub The thin lightweight design makes this hub a great travel companion Especially great for notebooks that come with a limited number of ports Add multiple peripherals such as a printer card reader cell phone iPod thumb drive mouse keyboard or an external hard drive Fully backward compatible with the USB 2 0/1 1 products Every port has its own power switch allowing you to control each port independently Please Note 2 4Ghz wireless devices such as wireless keyboard and mouse adapters may not work near USB 3 0 devices or hubs Connecting to a USB 2 0 port is recommended For a stable connection the devices connected to the 4-Port USB 3 0 Hub must not exceed a combined current of 5 volts 900 mAh This 4-Port USB 3 0 Hub does not charge your devices (it can only sync) System Requirements Windows 2000/XP/Vista/7/8/8 1/10 (Both 32-bit & 64-bit versions) MAC OS X and Above