The JUH340 high-performance Usb 3.0 4-Port Mini Hub allows up to four Usb 3.0 devices to be connected simultaneously at a transmission speed of 5 Gbps, while still providing connectivity and support for Usb 2.0 (480 Mbps) and 1.1 (12 Mbps) devices. It works with high-bandwidth SuperSpeed Usb 3.0 devices, such as external disk drives, high-resolution webcams, video surveillance cameras, digital video cameras, multi-channel audio and more.