2 input 2 output USB MIDI Interface, support Windows XP, vista and Mac OSX.

Through controlling the button, this new product can change between four modes as below:

1, USB MIDI with 32 channels, 2 input, 2 output;

2, Can be used as MIDI extender, with the direct connection of 1in and 1out, 2in and 2out;

3, Can be used to be one port input(can change between input 1 and input 2), two ports output synchronously;