4 in 1 MIDI merger in a black aluminium cabinet. This product merges the incoming MIDI data of maximum four MIDI keyboards into one DIN MIDI out. Power supply is an optional normal DC USB power adaptor.

With this little MIDI Tool you can easily play with up to 4 keyboards or MIDI devices at one time, the MIDI data will be merged to one MIDI out and USB port. Basically the 4merge box works like a midi merge box. It merges an filers the incoming 4 midi signals and routes the data to the MIDI Out port and MIDI USB port.