An Otto customer wrote to the company to tell them about his satisfaction with the NoizeBarrier Micro Electronic Ear Plugs: "I wasn’t kidding about the Micros helping in a warrant arrest. We were going through a house and I had them on enhanced mode. I was able to pick up the sound of movement in a cellar. Excellent protection, even with flashbangs being deployed."
This U.S. patented and manufactured shield can be used for most situations that can become life threatening at any time for police officers.