Caldwell E-Max(R) Low Profile Electronic Hearing Protection - These electronic ear muffs utilize 2 microphones to enable true surround sound. It will cut off for sound over 85 decibels. The low profile design will fit most shooting styles. They are powered by 2 AAA batteries (not included.) Cutoff: 85dBNoise Reduction Rating: 23Two AAA Batteries-not includedLow Profile earcups reduce contact with gun stockTrue stereo sound for better localizationPadded adjustable headbandVolume control knobPower indicator lightFold compact