The 3M PELTOR ComTac VI NIB Headset is a reliable, rugged solution you can count on. With noise-canceling microphones, high fidelity speakers, and advanced digital signal processing, the ComTac VI headset provides a premier listening and communicating experience, both in and out of noise.New with the 3M PELTOR ComTac VI Headset: Natural Interaction Behavior (NIB): Short-range, headset-to-headset communication in high noise environments without the use of an external communications radio. The NIB function allows for 4 team members to speak simultaneously and over 60 people to listen within a 5 meter radius. Audio transmit is activated by either a voice activated switch (VOX) for hands-free operation or by a push-to-talk button. A tactile button on the left ear cup easily allows the user to turn the VOX function on or off. Mission Audio Profiles (MAP): Advanced environmental listening settings that optimize the amplitude and frequency for specific conditions. The Mission Audio Profiles have been designed with a variety of combat and combat support operations in mind. The environmental listening feature, also known as “Talk-Through”, uses a proprietary digital audio circuit that allows safe audio sounds to bypass the hearing protection while still helping protect against harmful noises. Hear the difference.