All Brass Soundreturn for Trumpet bell

All Brass Soundreturn for Trumpet bell, Sound Return for Trumpet, A light concave aluminium ring with three springs that hold onto the rim of the trumpet cup, Suitable for playing in noisy surroundings when it is difficult to hear oneself, Advantage over sound reflectors: due to its concave shape, the ring provides better natural reflection, as well as the possibility to move freely, The design allows the simultaneous use of wireless microphones and mutes, Made in Argentina ...