3M/Peltor, ComTac VI, Electronic Earmuff with Boom Microphone MT20H682FB-47N CY October 12, 2021 admin I put batteries in them and they beeped and the sound changed. WE APPRECIATE YOUR PATIENCE AND REMAIN COMMITTED TO DELIVERING. PLEASE ASK ALL QUESTIONS. I WILL REPLY TO ALL QUESTIONS IN A TIMELY MANNE... Read More