H-CMR SAR version is a entire WATERPROOF (IP 67) helicopter helmet
The entire helmet is certified IP67, not only the microphone and the speakers. The H-CMR SAR version combine the advantages of the normal H-CMR (weight, sound attenuation, comfort ...) with the dedicated development to meet the expectations of SAR missions or hostile environments.
The H-CMR helicopter helmet was tested and kept all the functionalities after dust and water immersion testing.
What is IP67
It is the Ingress Protection (IP) numbers for water and dust proof.
The first number of the IP is for the part's protection against dust.
Range : 0 to 6 0, meaning no protection against dust and sand, and 6, meaning 100% protection against dust.
The second number is for the part's protection against liquids
RANGE : 0 to 9 Here 7 means : protected against the effects of temporary immersion at 1m for 30 minutes.