Add Bluetooth to any aviation headset - any brand, passive or active noise reduction.

Get alerts from your favorite aviation app, listen to music on long cross countries, or even make a phone call to get clearance while on the ground. The Audio Link uses Bluetooth to connect to enabled devices.

Features:

• Dual headset volume knobs
• Audio priority
• Bluetooth volume control
• Mono/stereo switch
• USB Type C power input

Works with any standard twin PJ plug aviation headset: David Clark, Sigtronics, Telex. Bose X, and more. Uses 2 AA batteries (not included), but can also be powered via the USB type C port on the side of the unit. 

I used this for the last year and it worked great with my David Clark headset.