The Pyramex Sentinel Electronic Ear Muffs provide a noise reduction rating (NRR) of 26dB, ensuring effective hearing protection while shooting or in noisy environments. These earmuffs feature a slim profile design and height adjustment to fit all sizes, making them comfortable for extended use. The fold-away padded headband offers added convenience and comfort.Included features such as a front-facing microphone amplify hearing while compressing harmful sounds to a safe level. The earmuffs also include an auto shut-off function after four hours of inactivity and a 3.5 mm AUX jack for connecting MP3 players and mobile devices. Two AAA batteries are included for immediate use.