The Racing Radios Signature ANR two-way headset is built for those situations where additional hearing protection is a must have. These headsets were designed with quality in mind, in our Forest Park, Georgia engineering department. It provides superior noise suppression in high ambient noise environments with the same 2-way capabilities of our standard headset. If you have an existing headset, and would like to have it upgraded with our ANR modules, we offer an ANR modification package. Please see (ANR-MOD) for details.