Safety Works SWX00260 Digital am/fm Earmuff, 4 Piece Listen to music hands-free after pairing these ear muffs to another Bluetooth device. Digital Bluetooth MP3/AM/FM Stereo Ear Muffs offers a Noise Reduction Rating (NRR) of 23 db, helping prevent hearing damage. Allows up to 10 AM and 10 FM preset stations to help allow you to listen to your favorite stations. AM/FM/MP3-compatible (connection cord for MP3 player is not included). Includes AAA Duracell batteries.