well, here's the quick version...whether K band or any other, leaving out Laser...it takes the larger object out front, so if you are in front of a tractor trailer, I will get the T/T...most of us, while moving leave it off until we see the speeder, then, instant on, instant reading, thus thumb faster than foot...if stationary, same thing, leave it off until I see violator...now with that said, you might pick up my signal down the road to warn you, but I am busy w/ a speeder anyway...so it really didn't matter...laser, is dead on...tight signal able to shoot between vehicles so larger vehicle doesn't apply here...