Amplified Push-To-Talk system allows low-impedance military communications headsets (Comtac, MSA Sordin, etc) 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 or use a separate in-line amplifier - TP-120 / U-174 / U-93 / Helicopter socket on headset end, Midland 2-pin plug on radio end - Pre-wired for Military / NATO-US wired headsets (MIC -, EAR +, MIC +, EAR -). Please contact us if you would like it wired for a different format (NATO-UK, Off-road, PCI, etc.) -