Battery replacement socket changed, comes with a dedicated case, and a dedicated rack that can store the controller and sound source module. Operation has been confirmed. Please understand that the appearance and aging may show signs of wear due to the age of the equipment. The battery was replaced a while ago, so it may be dead. However, it will work if you insert a new battery into the socket. The packaging will be a simple wrapping of the rack's exterior with cardboard. If you are concerned about this, please refrain from purchasing.