High attenuating hearing protector in two models: stand-alone headband or safety helmet attachment Bluetooth® technology for connection to one external device for hands-free talk and streaming Noise cancelling boom microphone for clear speech transmission in noisy environments. Level-dependent function for ambient listening to help improve your situational awareness Auto-pairing to quickly pair and connect to your mobile device Built-in FM-Radio with radio volume limited to 82dB Voice guided menu system Digital station search with ability to store up to 4 favorite stations Auto power off: The headset will turn off after 4 hrs of non-use to save battery Low-battery warning at low battery level With Bluetooth® wireless communication, noise-cancelling boom microphone, integrated FM-Radio and level-dependent function for ambient listening, the WS™ ALERT™ XP Headset not only helps protect you against hazardous noise, but also makes it easy to make phone calls with both hands free in noisy environments. With Bluetooth® wireless communication, noise-cancelling boom microphone, integrated FM-Radio and level-dependent function for ambient listening, the WS™ ALERT™ XP Headset not only helps protect you against hazardous noise, but also makes it easy to make phone calls with both hands free in noisy environments. Useful when you need to be connected to your mobile phone throughout the day (e.g. handymen in construction companies, private contractors driving their own machines, farmers in agriculture business, maintenance workers in industrial applications etc.); everywhere hands-free communication and hearing protection could be of benefit.