G LAB Patch Box consists of No. 4 passive TRS Jack type 6,3mm inputs, No. 4 TRS Jack type 6,3mm outputs plus additionally MIDI IN and OUT. It has mounting holes that matching to all G LAB pedalboards. The isolated TRS stereo joint could be used both to connect control cables of the amp and also with mono signals to make easy connection with input and output/ fx loop send and fx return from the pedalboard.