Safety Works Radio Earmuffs a blend of comfort, protection, and entertainment. Designed to safeguard your hearing with a noise reduction rating of 24dB, these earmuffs also allow you to enjoy your favorite music or radio programs. Equipped with 8 preset FM channels and 8 preset AM channels, you can easily switch between stations. The digital clock display adds convenience, while the adjustable steel headband and comfort-cushion headband and earcups ensure a secure and comfortable fit for extended wear. An auxiliary jack cord lets you connect your MP3 player, enhancing your listening experience. Powered by two included "AA" batteries, these earmuffs are ready to use right out of the package. Model Number: 10121816