This is the Aerophone AE-05, released by Roland. I used it for fingering practice at home. I used it for about 6 months, and it shows some signs of use. I have confirmed that it works before listing it, and the mouthpiece has been replaced with a new one. Aerophone GO AE-05 3 types of genuine power cables Dedicated case Neck strap 4 AA batteries No tobacco, pets, or children in the house.