Briin, first of all my apoligies for not getting back to you after your response. My knowledge of the site and navigating around it are thankfully worse than in the air. I have mine hard wired also, appears to be very accurate with very little issues. I have found that when the unit turns on, if I don't flick up to flight mode and leave it in ground mode it sometimes turns off? One other issue is that it wont display my code when transponder on and squwaking, I have cleaned the transponder antennae with no change.... Anyway thanks for your input. Regards Danny.