My parents got me the Cobra Electronics XRS 9330 Radar Detector when I graduated from college before I drove across the country. This is one of the most confusing things I've ever owned. It appears to pick up and display 23490346926 different kinds of radar, and you never know which one is actually a cop or not. After a few days of jamming on the breaks regularly to absolutely no one being around, in areas where there was no chance that a speed trap could ever be hidden (have you ever driven across Kansas? Somehow I don't think the cops are sitting in the middle of the corn field, call me crazy, but that'd probably be one pissed off farmer. Or New Mexico, nothing but open stretches as far as you can see). The real deal breaker was as a sailed past a cop in Nevada doing 90 and as he pulled up behind me and turned the lights on in his cruiser, THAT was when the detector started to beep. I pulled it off the dash and haven't used it since.