YAMAHA QY700 sequencer. It works without any problems, but the plus and minus keys sometimes require a firm press to respond. The numeric keypad and other keys may also be slow to respond, but pressing them firmly should make them work. The included floppy disk has been formatted, so it's empty. I deleted the demo songs when I bought it because I didn't intend to sell it at the time. I'll include the valuable QY700 Easy Play book, so please enjoy a fun and fulfilling composing life. ※ There is a crack on the right corner in the 6th image. ※ Please forgive any oversights due to its age. This is something I cherished, but it's an old vintage item, so I hope those who understand this will purchase it. Please refrain from purchasing if you are overly concerned about details. The following is quoted from the YAMAHA website: QY700 Discontinued Product The top-of-the-line model of the QY series This top model is the culmination of the know-how cultivated in the QY series, thoroughly pursuing the professional performance necessary for next-generation music production. It integrates the strongest sequencing performance and a high-quality XG sound source, allowing for detailed data programming to be completed in a single unit. It achieves clear operation and is useful in a wide range of scenes, from professional use to beginners. Equipped with the strongest sequencing performance The memory capacity is approximately 110,000 notes (maximum 10 songs). It can handle the production of large songs and long non-stop sequences with ease. The note resolution is also 1/480, making it possible to reproduce subtle rhythms. The number of tracks is 32 sequencer tracks for recording normal note data and 16 pattern tracks for accompaniment, for a total of 48 tracks. By using an external sound source in combination, it supports grand ensemble songs with 48 parts. It also has two sets of MIDI IN/OUT terminals each. Various system upgrades are possible. If you like it or are looking for one, why not?