3M WorkTunes HRXS220A hearing protection, black, 31 dB

protects the hearing with simultaneous AM and FM radio reception with the built-in antenna, digital station search and voice-controlled menu system with frequency announcement, 3.5 mm stereo input (only for listening, limited to 82 dB) for connecting external devices (e.g. Smartphone, radio, intercom or iPod), the automatic switch-off function switches off the ear hook after 4 hours of non-use in order to save energy, a warning signal informs the wearer when the batteries need to be replaced, the electronics are located in the outer part of the capsule, to reduce corrosion caused by sweat