ANSI S3.19-1974 Rated The sleek and comfortable Alpha Electronic Ear Muffs by M&P are excellent for shooting at the range. These muffs aren't just great for shooting. Whether you are doing yard work, looking for quiet while studying, traveling, or even out on a construction site these muffs will help save your hearing. They amplify low level sounds and compress high db noises. Great for all day wear The padded headband and adjustable cushioned ear cups make these ear muffs great for wearing all day! Bring your favorite music with you to the range. These muffs feature an audio input jack that plays your MP3 music through the ear muffs while you shoot. Padded headband for comfort NRR 23 noise reduction rating Uses 2 AAA batteries