MSA 10121816 Earmuff, 24 dB NRR

The MP3/AM/FM stereo hearing protector ear muffs balance comfort, protection and the ability to listen to the radio or MP3 player. Features noise reduction rating of 21 dB. Meets ANSI S319-1974 and CSA Z94.2-02, Class B, retains 82 dB safe noise cut-off, even with MP3 player in use. Automatic radio shut-off when MP3 is connected. Free auxiliary cord and two heavy-duty AA batteries.