Allows low-impedance mics found on some military communications headsets to work with high impedance civilian handheld or general aviation radio systems - If you've plugged your military headset into a civilian radio and are having trouble being heard on the other end, this will fix your problem without needing to swap your headset's mic out - NATO standard TP-120 / U-174 / U-93 / Helicopter plug ends - Military / NATO-US / wiring format - High performance amplification circuit - Simple plug and play install between your headset and PTT