With the STOMP-IO module, you can integrate guitar effect pedals and similar devices into your AE modular system! For output (send) and input (return) return there is a mono minijack socket; two minijack to 1/4" socket adapters are included as effect pedals usually work with the latter ones. Send and return levels can be controlled with separate knobs.
You can find more information about this module on the AE Modular Wiki.
(Price without VAT; for buyers inside the EU 19% VAT will be added to the shown price = 38,08€)