Gakken Otona no Kagaku Magazine Vol. 17 Theremin mini, a completed product. I confirmed its operation before listing it, and verified that it produces sound. This is the Theremin mini, a completed product, including the main unit and the booklet. The included mini screwdriver is on the bottom. The box and batteries are not included. The antenna has some bending. I have confirmed that it produces sound, but please understand that this is an old, used item.