3M/Peltor ComTac VI Defender, Electronic Earmuff, Matte Finish, Black, NIB (Natural Interaction Behavior) Wireless Technology, Includes Boom Microphone MT20H682FB-09NSVS 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.