I got this radar used, without any knowledge besides the hype of Escorts and how good they are. Been driving around with it, every band on using city and sometimes the A setting (forgot what it was really called...). The only time I get warnings are from grocery store automatic doors and the contraptions that tell you how fast you are going. But what I got this radar for was for stationary (and sometimes moving) police cars that are scanning your speed! Not once has the radar warned me, and I have passed by about 9 police cars chillin' in their car with their radars up. Thankfully, I knew where not to speed and where they like to chill. Do I have a defective radar???