Lightweight with a low profile, the E-Max Hearing Protection amplifies sounds up to 20dB so you can hear whats going on around you. With sounds over 85dB, the speakers momentarily shut off to protect your hearing. Cushioned foam earcups with a behind-the-head band offer all-day comfort. Two microphones, one on each earcup, for true stereo sound. Adjustable volume control. Audio-input jack. Requires two AAA batteries (not included). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Electronic Earmuffs.