The Low-Profile E-Max hearing protection combines great circuitry with a low profile earcup thats ideal for shotgun shooters and action shooters. The E-Max amplifies 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 shooters 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). 23 NRR23 NRR, DUAL MICROPHONESADJUSTABLE VOLUME CONTROLAMPLIFY SOUNDS BELOW 85 DECIBELS, ABOVE 85 DECIBELS, THE MICROPHONES INSTANTLY SHUT OFF TO PROTECT THE SHOOTER’S HEARINGAUDIO INPUT JACKTRUE STEREO AMPLIFICATION DELIVERS MAXIMUM VOLUME AND CLARITYWARNING: Cancer and Reproductive Harm -www.P65Warnings.ca.gov