Musicians, guitarists, pedalboard builders – lost or fried the power supply for your Boss pedal? This universal 9V AC/DC power adapter is here to save your gig. It's designed as a direct replacement for the standard Boss PSA-series adapters (like the PSA-120S, PSA120, etc.). It outputs 9V DC, which is what most standard Boss pedals require. The compatibility list is huge: it works with Boss ME-25, ME-50, ME-70, ME-80, DS-1, DD-20, GT-10, RC-3, RC-30, RV-5, RV-6, TU-3 tuner, VE-20, and many more. ALWAYS double-check the voltage and polarity requirements printed on YOUR specific pedal before ordering – it should say something like '9V DC' and show the center-negative symbol. This adapter is center-negative, which is the standard for Boss. It's a simple wall-wart style plug that gives you a reliable power source so you're not burning through 9V batteries every week. Perfect for home practice, the studio, or as a backup in your gig bag. Just plug it into the wall, connect the cable to your pedal, and get back to making noise. An essential, affordable accessory for any guitarist who uses pedals.