Caldwells standard EMax hearing protection combines great circuitry with a low profile earcup ideal for shotgun shooters and action shooters. The microphones in the EMax amplify sounds below 85 decibels which includes 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. EMax hearing protection has a padded headband audio input jack volume control knob and power indicator light. EMax earmuffs provide a 23NRR and run on 2 AAA batteries not included. This model has a green finish on the earcups.