Provides either 9-dB or 15-dB protection at the flip of a switch Preserves clarity of speech and richness of music Instantaneously protects from loud, percussive sounds Enhances soft sounds if desired Ready-fit eartips, custom moulds are not required Professional hearing protection with adaptive noise-reduction technology that automatically adjusts to changing sound levels. Etymotic MP9-15 Music-PRO electronic earplugs are designed for musicians who want to hear naturally, need protection when hearing is at risk, and want to avoid the inconvenience of removing earplugs to hear. Etymotic MP9-15 Music-PRO Earplugs are ideal for performers, front-of-house crews, entertainment industry support staff, security personnel and audiences. Different levels of protection can be adjusted making for 9dB or 15dB of protection with a simple switch located on the earplugs. Music-PRO earplugs with ready-fit eartips that can be worn without the need to have custom moulds made. Hearing is experienced naturally as if nothing is in the ears when wearing Etymotic Music-PRO earplugs until sound exceeds safe levels. As sound levels increase, the earplugs provide gradual sound reduction. Natural hearing is restored when sound returns to safe levels. The earplugs can also enhance soft sounds if desired. Healthy hearing for a lifetime.