Pulled out of my C120. It works OK, but not great. When two headsets are plugged the squelch breaks very easily. It's hard to find a balance where it doesn't break and stay on or doesn't come on with voice. I'm not sure if there's something that can be adjusted with headset mics, or what, but I never dug into it too deeply. This would be a great unit if you're 90% single pilot with an occasional passenger and don't mind the squelch issues. Would also be a great unit to checkout headsets on the ground, or for an off road vehicle. Includes two PTT extensions. $50 shipped OBO.