Dennis wrote: The one I was looking at is a permanently mounted unit with ship 12v power. Although the antennas can be internal or external . The Pro unit also carries a letter of " certification" allowing it to be installed in a Cessna . Realize, this unit is a ADSB IN only .
Only ADS-B out is certified. ADS-B in is not required. Get a Stratux. It's the same thing at less than 1/2 the price. You can wire it to your 12v if you want.