This is a QY70 with sound editing and sequencer functions. Both battery and adapter have been tested and confirmed to be working, and sound is coming out from the LINE OUT. I love YAMAHA's QY series and used it often for composing, but I'm selling it to organize my equipment as I'm less involved in music now. I think it would be great for those who do home recording, so please consider purchasing. For this listing, the backup battery has been replaced with a new one. (Replacement date: January 5, 2026) I have reset it to factory settings, but if you are concerned, please format it yourself. I used it often and loved it, so there are signs of use such as faded lettering, paint peeling, and scratches. Please check the photos. The LCD has some dust, but it's in relatively good condition. I don't have the manual, so I haven't been able to check all the functions. [Points of concern] ① Although each button works, the M7 (9) and 7 (9) keys on the keyboard require a slightly firmer press than the other buttons. (Input is possible without any problems) ② I don't have the equipment to test the included data disk, so I can't guarantee that it can be read. Operation has not been confirmed. Please understand the above points and that this is a used item before purchasing. Shipping will be via Rakuraku Mercari. - Model name: QY70 - Accessories: Data disk (2 pieces) - Power adapter: Included (MODEL PA-3) - Functions: Sound editing, sequencer function Additional information: I have removed the photo taken before the backup battery replacement. Thank you for viewing.