The Digital Audio Recorder Adapter allows you to record everything heard over the aircraft intercom system to your digital recording device. It's great for creating your own aerial videos without excess cabin noise. It will record all of the audio transmitted through the intercom system, including in-cabin audio and ATC transmissions. It works with devices that use a 3.5mm stereo external mic input such as the GoPro HERO2, Drift HD, or most other handheld Video Camera or personal audio recorder. Can be used with a handheld digital audio recorder to create your own CVR (Cockpit Voice Recorder). Great for CFI's and Students to review radio communication skills after the flight!