3M AO Safety/3M Tekk WorkTunes i.3 AM/FM Hearing Protector, Silver and White #90569 Hearing protector with noise reduction up to 22 dB plus stereo AM/FM or MP3 player input Cuts noise by up to 22 dB Built-in AM/FM stereo with antenna and toggle switch, plus input jack and patch cord for use with MP3 players Gel/foam cushions maintain ear comfort; dB limiter protects against dangerous noise levels Noise Reduction Rating of 22 dB