BEST BRASS EB3-TRB e-BRASS III Practice Mute Silencer -30dB for Trombone

■ Silencer for Trombone & Flugelhorn. Battery-powered trombone mute! The e-Brass has built-in electronic circuitry, allowing you to plug headphones directly into the mute. It provides sound dampening even when the power is OFF, making it usable as a practice mute.