The XOR Electronics 2HP Midi Expander is an inexpensive way to NerdSeq module with full MIDI connectivity. The two TE slim module is connected to the back of the main module and connects to other MIDI devices like desktop synthesizers, groove boxes or rack devices via the included TRS-A/MIDI adapters. One MIDI input and one MIDI output each are provided, and another jack is switchable between MIDI Thru or as a second MIDI output.