Specifically designed for military personnel to help reduce exposure to hazardous levels of noise, improve situational awareness and at the same time enable two-way radio communication in noisy environments. This product is compatible with other military gear like helmets and protective vests. The ComTac XPI is a fully independent dual earphone system for talk through and external radio signal. It is designed to be worn comfortably under a helmet, be used with different kinds of weapons without being in the way, and at the same time protect effectively against harmful noise levels.