This is one of only MIDI to USB cable does not include housing on the cable ... This allows you to connect any MIDI synth on the USB.
The USB connector has two LEDs, one green and one red output for the input.
No need for drivers! The interface is automatically recognized under OS X.
on the other hand I encountered some problems with SysEx messages and my M1 ... (Have to use another interface)
I use it for about 2 years and I love its convenience and without the fuss ... I have owned many MIDI interfaces (see my old stuff on my page) and is one of the most smart ways to add MIDI to a MacBook, for example.
The price / quality ratio is excellent!
I would gladly do it again this choice.