Brand New In Box – Bose A20 Aviation Headset (Military Specification Variant) Up for sale is a brand-new, completely unused Bose A20 Aviation Headset. This unit has never been used and remains in pristine condition inside its original factory box. Please note that this is a highly specific Military/Helicopter configuration featuring a 5-Ohm low-impedance dynamic microphone and a single U-174 plug. Please verify compatibility with your specific aircraft communication system before purchasing. Product Details & Specifications: • Model: Bose A20 Headset Assembly • Part Number (MPN): 324843-W130 • Plug Type: U-174 (Single Plug) • Microphone: 5-Ohm Low-Impedance Dynamic Mic (Military Spec) • Power: Battery Powered (Uses 2 AA batteries) • Bluetooth: This specific military variant does NOT feature Bluetooth connectivity • Origin: Assembled in USA What’s Included: • Original Bose A20 factory box (carrying the matching serial number on the outer label) • Brand new Bose A20 Headset with military downcable configuration