The A20 aviation headset is the most advanced Bose pilot headset yet. Its breakthrough innovations reduce more noise and provide even greater comfort than previous models, without compromising the clear audio you expect from Bose. Plus, the A20 aviation headset now includes auxiliary audio input and Bluetooth phone connectivity. The next-generation pilot headset from Bose. More than 20 years ago, Bose introduced active noise reducing headsets to aviation-and launched an entire industry.