Gakken Otona no Kagaku Theremin Premium. - Model Name: Theremin Premium - Included: Instruction manual, sheet music collection - Color: White - Brand: Living Science Gakken Thank you for viewing. The playing method was too difficult for me, so I only touched it a few times and then put it away in the closet. I inserted batteries to check the operation, and it produced sound, but there was a crackling noise, like a bad connection. I'm not sure if this is a malfunction of the device or due to the grounding, etc., as I am a complete novice. Therefore, I am selling it as a junk item. The main body doesn't have any noticeable scratches or stains, but the box, instruction manual, and sheet music collection show signs of use. Everything in the photos is included.