The dub h7 is a 7 port universal serial bus usb 20 hub that allows you to connect up to 7 usb 20 peripherals and devices to your usb 20 ready pc or imac providing an out of the box industry standard bus this pocket sized device expands your pc and mac by adding 7 usb 20 ports to your system it is designed to provide quick and easy access to the 7 type a downstream ports to connect to peripherals with usb 20 support other usb hubs and devices a single type b upstream port is provided t