?? The adapter converts AC wall power to 9-Volt DC for powering most instrument pedals and other 9-volt battery devices.?? Made in a state-of-the-art manufacturing facility to the most stringent quality controls in the industry.?? You can ensure a consistent battery-free performance when you directly power it.?? Wide Compatibility suitable for most of the effect pedal please reference full list of compatible models in the product packing.?? Professional noise isolation performance.