Bluetooth aviation headset ANR UFQ BT-A28 vs bose a20,compare to  BOSE A20 aviation headset with bluetooth 

It is the result of UFQ R&D team's years hard work and continuous improvements.
But much lighter in weight,more comfortable,
much better for the bluetooth features than Bose A20 aviation headset 
We compared several big brands' bluetooth aviation headsets.
We are confident that UFQ bluetooth aviation headsets(adapters)
have the most powerful bluetooth features in the aviation headset market in the world!

If batteries low will still work as a ANR aviation headset
If batteries off will still work as a PNR avition headset!

UFQ aim at delivering maximum value to our customers for their investments and ensure that our clients get a high return on investment when they choose us!