I had the K40 With Laser Diffusers for years Worked great Didn't get a ticket for over 20 years. when K40 changed their system to blue tooth and then to the RL360 series. The detection ability seemed to suffer and there were a lot of startling false alarms. I changed to Escort 9500c1 about a year ago. miss the directional lights of the K40 slealth install (right for rear,Left for front) but like the silent operation because of GPS. Looks like it's a keeper. Have it in 2 cars.
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