The PSA-120S is the standard power supply for Boss compact and twin pedals, and it works with a long list of Roland and Boss gear including multi-effects, tuners, drum machines, and foot controllers. Output is 9V DC regulated at 500 mA with tip-negative polarity, the same spec that Boss effects have used for decades.

The cable is nearly 10 feet long, which gives you real flexibility in stage and studio layouts. An LED indicator confirms power status, and the redesigned plug won't block adjacent outlets on your power strip. Universal 100-240V AC input means it works anywhere in the world. A simple, reliable adapter that keeps your pedalboard running clean.