Bought it used. Powers on fine. Originally ran it with all filters on, had k wide, ka band wide, x off. I got one alert from a leo. It was very bad detection and gave no warning. It was in a work zone so the officer was behind multiple trucks and was positioned slightly facing the other side of the highway. I attributed the horrible detection to that. However, I turned all filters off, x band on, still running highway mode to see if it would false to anything. It will not. Even places my dfr3 would at least give me a low level alert to k with the k filter on that detector wouldn't go off for the dfr6. It's on firmware 1.10. did factory reset. Tried a different outlet. Held the detector to see if that would make a difference. So my question is, is this detector that good at filtering out falses even with all the filters turned off? It seems like its 95 percent of the way dead only alerting once to ka because he was literally stationary in the lane directly next to me causing it to go full tilt for only a moment as I passed him. Input obviously appreciated.