4 Way Junction (3 Mono - 1 TRS) Pedalboard Box Patch Bay

3 Mono TS plus 1 TRS Stereo, so you can hook up Guitar, AMP SND, AMP RTN, and TRS cable to change channels on your amp, OR Guitar, Amp Left, Amp Right, and change channels.

https://www.americanloopers.com/collections/5-junction-boxes-patch-bays-signal-split/products/4-way-junction-3-mono-1-trs-pedalboard-box-patch-bay