This is the KORG volca sample, a digital sample sequencer. I used it when I bought it, but I removed the batteries and stored it afterwards. I checked the operation before listing it, and it seems to be working fine. Despite its compact size, it's capable of powerful sound creation. [Brand] KORG [Category] Digital Sample Sequencer [Color] White系 (White-based) [Included Items] Main unit, box, instruction manual Please understand that this is a used item before purchasing.