The 3M peltor worktunes Pro headset helps protect you from potentially harmful workplace noise while at the same time enjoy listening to the built in AM/FM radio. The built-in antenna, fast digital tuning and ability to store stations makes the hearing protector flexible and easy to work with. 3.5 mm listen only stereo input (limited to 82 db) for connection to external devices (E.G. Cell phone, two-way radio, iPod) store up to 5 stations so you dont miss your favorite station AM/FM radio headset with built in antenna to prevent snagging on equipment professional-quality hearing protection (23Db NRR).