BELTBOX is a portable vocal dampener for singers. Now singers can warm-up their voices before auditions without singing into a pillow. Simply put the BELTBOX over ones mouth to quiet any warm-up sounds and to not disturb others. It muffles the voice but still allows one to hear if they are in the right key. The coolest part is that with the BELTBOX, someone can sing as loud as they can and it sounds like a whisper to everyone else.