The Pilot USA PA80H/HERO3 is an adapter that allows direct connection from the GoPro Hero3 Camera to a Helicopter Headset (U-174 Plug). It is a single cable solution to allow recording of cockpit audio from the intercom or radio with the GoPro Hero3 Camera System.
PA80H/HERO3: Mini USB to Helicopter Headset Adapter.
Works great, this is my second cable. First one failed after about 4 years of moderate use. Have it intertwined with my helmet / helmet mount gopro.
This cable has a coiled cord. When the coiled cord is not stretched, this cable is approximately 3-1/2 feet from end to end.