I have been driving through a construction zone for 3 weeks now, and there is a your speed drone. I assumed it was X band, which I have turned off on my RX-65 because my detector was quiet. But as I drove past it 3 days ago, it alerted to K band. (This also happened to me with another K drone). I was surprised to see that, and I thought my RX 65 was acting strange. So my question is, can the drones be programed to produce X band and switched to K band, or could the drone be fading in and out of the detectable range of my detector? I have been questioning my detector lately on K band, I hope I don't have a problem.