3M Peltor Comtac VIII Hearing Defender Headset OD Green MT14H418A-09 GN. Some versions are equipped with a downlead cable for connection to a radio via a push-to-talk (PTT) and a noise cancelling speech microphone for communication in noise. Specifications for 3M Peltor Comtac VIII Hearing Defender Headset: Manufacturer: PELTOR Condition: New Features of 3M VIII Hearing Defender Headset Advanced listening mode featuring Mission Audio Profiles (MAP) to help maximize audibility based on the acoustical environment Compatable to select helmets as a mounted device when the headset is converted with optional attachment accessory. Earplug mode to help maintain auditory situational awareness when used in combination with passive earplugs Environmental listening for auditory situational awareness Hearing protection to help protect from impulse and steady state noise Noise-cancelling speech microphone for communication in noise (select models) Soundscaping to help with radio communication and speech intelligibility in noise Tested in accordance with applicable sections of a variety of military and other standards Package Contents: 3M VIII Hearing Defender Headset 3M MT14H418A-09 GN: VIII Hearing Defender Headset OD Green