Allbrass Resonador Soundreturn Trumpet Mute

All Brass soundreturn for trumpet. 
Manufactured by All Brass.
This ring, when adjusted to the trumpet bell, provides a natural sound return, redirecting the sound back to the musician, which makes this accessory ideal for live performances in places where it is difficult to hear oneself playing. As this sound reflector is placed on the instrument and not on the microphone, the musician can move around the stage freely, without losing the possibility of hearing every note that is being played. 
Made with tempered steel springs, covered with a non-slip material. The body of the sound return is made of aluminium.