This is the Boss OD-3, a classic overdrive pedal. I bought it used and used it a few times at home, and I liked it, but I'm selling it due to various circumstances. There's no label on the back, so I don't know the specifics. Operation has been confirmed with both a battery and an AC adapter. There is no crackling or noise. Recommended for those who don't mind the appearance. I will also include a battery for testing. Thank you. I am also listing it on other sites. It's first-come, first-served, so I apologize if it sells out.