TASCAM advertises the US 20x20 as a 3.0 USB with reduced latency, and so on. but in fact it is only a 3.0 USB on a Win10 machine, not on Macs. My MacBook Pro 15 (late 2014, with 10.13.6 system) rates it with a 480mpbs connection (which means USB 2.0). Since TASCAM has not updated the firmware for a loooooong time now, it seems like a pretty bad marketing strategy. Their customer support takes forever to reply and is unable to give a convincing answer. obviously latency is not better than any other usb 2.0 interface (maybe even worse).