Code Red Battle Zero M6 Head Set. These Headsets by Code Red use bone conduction technology to transmit and receive audio signals through vibrations in the skull for a hands-free and distraction-free communication method. The Code Red Battle Zero M6 Headset allows for remote radio control of secondary devices (Such as cameras or lights) via the radio's built-in PTT button. For crystal clear communications while disassociating from surrounding noise wear the Code Red Battle Zero M6 Communication Headset with a Noise Reducing PTT. Package Contents: Code Red Battle Zero M6 Headset Code Red BattleZero-M6: Battle Zero M6 Head Set