Adapter for Common Tactical Headset Downlead(Nexus TP-120 / U174) to Invisio X50 Control Box/PTT. For NATO 3M/Peltor, Ops-Core, TCI, Otto, David Clark, TEA, & more This adapter allows you to connect your tactical headset to your existing Invisio X50. Ideal for setups received from military surplus. Features & Benefits: 8 Inch Cable NATO Headset Connector Click Here for Radio/Phone Adapter Cables