Gakken's Adult Science Theremin Premium. I've confirmed that it produces sound when batteries are inserted, but I'm offering it at a bargain price as junk due to the following reasons: • It's beautifully sun-faded to an amber color. • The vertical antennas are included, but one is broken (the other is fine). • The knobs have scratchiness. • The volume control's contact feels a bit unreliable. Thank you for your understanding.