I'm sure they do, but i have a cobra xrs 9530 that ive had since about 2008. It always worked great for me. Ive had it in the closet for about a year now and am thinking of hooking it up. I guess it cant hurt right? its a 12 band radar.
I've had the same ole Cobra for probably close to a decade and it still works just fine. Picks up radar, motion sensor doors and laser like the day I bought it.