MSA's durable MICH Communication System was first worn under the MSA Advanced Combat Helmets (ACH) of U.S. soldiers on Middle East battlegrounds. Now, Law Enforcement officers can also wear MSA's MICH Communication System, either as a stand-alone headset or under MSA's ACH. The MICH System will protect hearing while enabling clear radio/intercom communications and situational awareness on the job. They use an unobtrusive bone-conduction microphone/sound transmission system to interface with various police radio transceivers and intercom systems.