Caldwell E-MaxA(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: 85dB; Noise Reduction Rating: 23; Two AAA Batteries-not included; Low Profile earcups reduce contact with gun stock; True stereo sound for better localization; Padded adjustable headband; Volume control knob; Power indicator light; Fold compact;