This provides 3 buttons like the FS3X foot switch to give you more functionality for your Digitech Trio+ looper pedal, while also giving you true bypass ability.
When you're not actively recording a guitar loop, your signal is otherwise buffered by the Trio+ which alters its sound (I find it's a type of tone suck)... this lets you bypass the Trio+ altogether with true bypass to maintain your tone.
Be aware this will not switch the Trio+'s FX loop. If you rely on that FX loop you will either need A) to stop using it and move the pedal to the end of your signal chain (or use the mixer out and a 2nd amp), B) to use a separate AB-type switcher dedicated to the FX loop, or C) simply continue using the Trio+'s buffered bypass and forego this pedal's true bypass. You can still use its 3-button FS3X footswitches regardless of whether you use the bypass.
9V DC power is optional and only necessary for the status LED.
I also have a smaller, cheaper, non-deluxe version that provides true bypass without the FS3X foot switches. Contact me if interested.
NOTE: This product is created by MAS Effects and is not affiliated with Digitech.