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. Benefits, Protect your hearing and listen to AM/FM radio at the same time with built-in antenna. Digital station search and voice guided menu system with announced frequencies, 3.5 mm listen only stereo input (limited to 82 dB) for connection to external devices (e.g. mobile phone, radio, two-way radio and iPod), Auto power off turns headset off after 4 hours of non-use, to save energy and a low-battery warning informs you when to change batteries, To reduce the corrosion caused by sweat the electronics are located in the outer part of the cup, Store up to 5 stations on the headset, 40 hours battery life