Please be sure to read my profile. Price reduced KORG Rhythm Machine, Recorder, Tuner Beat Boy I bought this, but I haven't used it much and don't plan to use it in the future, so I'm selling it. It's a multi-functional product, so I haven't confirmed the operation of all the functions, but I checked it for the listing, and the built-in microphone tuner function and drum function worked without any problems. There is a copy of the instruction manual. Please refrain from purchasing if you are nervous as it is a used item.