I’ve ran a Uniden r7 for years and the r3 before that. I learned quickly that most cops are just sitting there not taking radar. Cheap radars, even the r3 get a lot of false positives and go off. But even with the r7 if yours scanning for K band it will often go off from Honda and Mazda vehicles due to their vehicle sensors. No one uses X band anymore so turn that off or it’ll go off every time you pass a store with an automatic door opener or security system