The Peltor CH-5 J11 Military Headset NATO Connection is designed to provide protection against hazardous noise levels and very loud impact sounds. The CH-5 (MT73H450F-86) Military Headset has been designed for use in extreme military environments such as tanks and ground crew working in close proximity to fighter jets and helicopters. This headset been tested in accordance with [EN 352-1:2002 / EN 352-3:2002, EN 352-6:2002] and holds an IP68 rating (Water tight microphone). Features: Effective protection from loud noises Comfortable for extended periods of use MT73H450F-86 Specifications: Dimensions: H:16.0 x W:16.0 x D:24.0 cm Colour: Black Guarantee:1 year Material: Plastic Model Number: 100006182