Hellberg 47102 Active Helmet Mount Ear DefendersHearing protection with Active listening microphones. Active provides situational awareness, allowing you to communicate with your colleagues, hear warning signals and other important information without removing your hearing protector, allowing you to stay protected from hazardous noise. Microphones in each ear cup ensure perfect directional hearing. The level dependent electronic protection system limits all sounds through the speakers to a safe level.Level Dependent Active ListeningRotary knob controlsEPS (Electronic Protection System)3,5mm AUX inputQuick and easy helmet mounting Hellberg 47102 Active Helmet Mount Ear Defenders