MIDI 2x2 USB MIDI interface<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Inputs: 2 MIDI inputs (32 MIDI channels) Outputs: 2 MIDI outputs (32 MIDI channels) Power supply: USB Powered， no external power required </span></li><li><span class="a-list-item"> Power supply: USB Powered， no external power required Operating Systems: Mac OSX， Windows XP and above (no driver needed) </span></li><li><span class="a-list-item"> ATTACHMENT: USB cable </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/31izJ7zKphL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41Bzwk1U6mL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41ciGM19NmL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41%2BliveWyRL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41YXKUFuaVL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41cvTIruLeL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/41DGn5LLF7L.jpg" noproxy>