Buzzing practice is one of the most important exercises for brass players. This product is applied to musical instruments to practice buzzing as if you were playing. It is recommended for those who have a weak sound or have difficulty playing high notes, because it takes a lot more energy to play than a regular mouthpiece. In addition, the buzz time is smaller than the actual mouthpiece, so it is effective when warm-up is required before playing, and you can practice at home without a practice mute. The Pro product has a larger hole size than the standard, so it may be a little difficult for beginners.It is recommended for players with strong embouchure or those who have a strong spirit of challenge!