Miditech Midi Thru/Filter, 4-Way MIDI Thru Signal Distributor, Integrated MIDI filter, Connections: 1 x MIDI In, 4 x MIDI Thru, LED for MIDI In Signal, Panic Button, 8 DIP switches for filter set-ups, Programmable via dip switch, MIDI keyboard or PC editor, Power supply via MIDI, Dimensions: 119 x 56 x 34 mm