The all new NitroAV -Professional Grade- 4-port 1394b FireWire 800 hub/repeater plus 4-Port USB 3.0 SuperSpeed hub allows you to easily attach (4) FireWire devices and (4) USB devices, simultaneously, when attached to a USB and FireWire port. Perfect for audio and video devices, delivering solid performance not seen in comparable devices on the market! Use the NitroAV FireWire 800 and 5Gb/s USB 3 hub, for blazing fast transfer rates, and elimination of daisy chaining, plugging and unplugging, and underpowering devices. Simply attach a FireWire cable to expand to four FireWire 400 or 800 devices, and a USB cable to expand to four USB 2.0 or 3.0 devices. The NitroAV USB 3.0 ports operate in Bus-Powered or Self-Powered mode. The DC jack and Terminal Blocks have been specifically designed to supply more power for heavy power devices. This eliminates underpowering devices. Each port can receive its full power, so professionals and pro-sumers don"t have to worry about devices receiving proper, and optimum power, eliminating a wide variety of frustrating and potentially damaging scenarios with audio, video, card readers, flash, and storage devices.