Yamaha BC1 Breath Controller - w/ CASE, STRAP & PAPERS for DX1, DX5, DX7, CS-01

Apparently used very little, as neck-strap was never attached,
and is included with padded case and instructions.
A few light teeth-marks as shown in the photos;
from the excellent condition, my guess is that it was tested once or twice, but rarely if every used.