This is a microphone preamplifier from Presonus. I purchased it new and have kept it in storage, unused. There are stains on the adapter box and the instruction manual. I also have a new, unused V2 (one generation older) available. If you're interested, I can list it separately. I will offer a discount for combined purchases. I am also planning to list this on other flea market sites, so please forgive me if it sells out.