The low-profile E-Max hearing protection from Caldwell combines great circuitry with a low profile earcup that s ideal for shotgun shooters and action shooters. The two microphones in the E-Max amplify sounds below 85 decibels, which amplifies normal communication, range commands, and environmental sounds. Above 85 decibels, the microphones shut off for a split second to protect the shooter s hearing. Two microphones - one in each cup - give the user true stereo sound and allow the user to identify the directional source of a sound. Includes an integrated audio input jack allowing music to be played. Runs on 2 AAA batteries (not included). Product Specifications True stereo sound for better localization Low Profile earcups reduce contact with gun stock Padded adjustable headband Volume control knob Power indicator light Fold compact