Roland PMA-5 GS Sound Module. Internal battery replaced (holder type). Comes with a dedicated pen. This is a used item, so there are some scratches and marks, but it's in fairly good condition. The LCD screen also has some scratches, but it's reasonably clean. I tested the demo data playback with my own power adapter (please note that the adapter is not included) and confirmed the sound through headphones. Front panel button operation was also confirmed. Battery operation was also tested and confirmed (batteries are not included). Other operations have not been confirmed. I do not have detailed knowledge of the equipment, so I may not be able to answer detailed questions. Please be aware that this is a used item, so there will be some wear and tear. I have checked it roughly, but there may be oversights in the details, so please forgive me in that case. Please purchase only if you understand that this is a vintage used item. Please be aware that we cannot accept claims after arrival. We do not ship overseas.