The model 6AVOH is a Over-The-Head fitting model McKay headset. It utilises an active noise cancelling microphone. The inclusion of two sealed electret microphones provide extremely effective noise cancelling characteristics at high noise levels. The ear muffs have been fitted with acoustic foam that effectively reduces unwanted background noise when used in high noise areas. For attenuation characteristics please contact us. The unique design allows this model to be used with our MWPTT Push-To-Talk assemblies for a wide range of popular two way radios. It is also compatible with our aviation leads. This is easily achieved by removing one lead and replacing it with another. This is especially convenient for organisations using the same headset on a range of portable, or for the aviator switching between fixed wing and rotary wing applications. The headset is also packaged with a nylon carry case to protect your headset and increase its operational life. It also includes a comprehensive instruction manual.