The TMK was invented to solve the problem of how to safely and professionally attach the portable microphone to the uniform so that it doesn't fall off. This is Brian Websters story:
One evening after dark I had to chase down a suspect who had a knife. Once I caught him and tackled him to the ground I could not find my microphone. It had fallen off my uniform and was in between me and the suspect making it impossible to radio my position. I was able to take him into custody and everything turned out okay but since then I have heard many stories of officers losing their mics and things going horribly wrong because of it. Therefore, the TMK was born. The TMK is a simple, yet reliable and professional solution to the microphone retention problem. It can be worn on the front of the uniform or under the shoulder strap (epaulette). Once in place, the TMK becomes invisible as it is hidden by the microphone. The TMK keeps your microphone safely in place and keeps your uniform professional in appearance as it attaches by way of the uniform button, not the uniform. When in use, the TMK disappears and all that is seen is your mic.