The BuzzzMaster allows you the freedom to warm up anywhere. It is the perfect tool to help you target in and focus on your air stream, wind power and tongue placement, plus maintain proper embouchure formation to maximize your buzz for pinpoint accuracy.The air outlet is precision machined to provide resistance similar to that of the instrument. Designed by David O'Neill, the BuzzzMaster is a must-have tool to keep the buzz in your chops fresh and ready at all times. Unlike using your mouthpiece alone, or with other similar products, the BuzzzMaster design provides resistance similar to that of your instrument. Fits large shank trombone, bass trombone and euphonium mouthpieces.