The Silent Brass system lets you play your horn anywhere you want, anytime you want, and with just the kind of ambiance you want. You can mix into the sounds of a CD player, a Silent Piano, an electronic keyboard or another instrument using the Silent Brass System, and output your playing into a tape deck or even an amp with speakers. Never again will you have to search for a practice room or have to stop because it's getting late. The system includes the Silent Brass module, pickup mute, locking cable, belt-loop/strap, button earphones, and 9V battery. The module has been redesigned. It is sleeker, smaller, the sound quality has been improved, noise reduced, and the controls simplified.