AR Resonance "First Aid" - Accessories for Trumpet/Cornet/Flugelhorn By attaching this, the sound is focused on the spot where it resonates naturally, resulting in improved intonation, response, and slotting, as well as accurate articulation. This is a bronze silver finish. It's practically new, having only been test-played. Includes the main unit, 2 rubber bands for securing it, and a protective bag. The new price is 26,510 yen (tax included).