3M PELTOR LiteCom Plus Headsets feature a built-in analogue two-way radio, available in 8 channel PMR version and 69 channel PMR version, both with 121 sub-channels to help you communicate even more efficiently in noisy environments. The noise cancelling dynamic microphone provides voice-operated transmission (VOX) for hands free use, and an external jack allows you to connect a mobile device or another two-way radio. Sound levels constantly change in demanding situations. When the noise quiets down, you can turn up the environmental listening function to improve situational awareness or speak with co-workers who are close by, and if the hazardous noise returns the level dependent technology will kick in to help protect your hearing again. Litecom Plus Headsets have a clear battery status indicator and an auto power off function to save energy.