I installed this system in my bass boat. Unplugging the unit and rebooting usually solves the issue. Even when volume is maxed on phone the sound is just not loud enough this is more of a problem during calls. I have had three sets of Peltors as well (and have ComTac III and IVs too), and these Leights are a far superior alternative to the 3Ms. Though from my experience, the sound isolation is fantastic. Los he estado utilizando durante horas y ni un tipo molestia. This may be my best and most favorite equipment purchase in years! Cain is so close to win a competition that started his freshman year with his fellow football players. I just cant take the sandals off when Im near anyone because they smell vile! The battery life was about an hour and 15 minutes