This is a listing for a YAMAHA MU2000 sound module. Before listing, I confirmed that the AC adapter was connected, the power turned on, and sound was produced. As I am not a specialist, I have not been able to verify all functions. Please understand that this is an as-is sale. A valuable instruction manual is included. Being an older item, there are some scratches and stains. It can be used for DTM and DAW, as well as an expansion sound source for synthesizers. It is equipped with top-class XG sound sources and supports USB and sampling. Especially recommended for those who make music on a computer ✨ Included items: AC adapter / Instruction manual