That all depends. If the cop is leaving his radar ON, you can pick up x and k a mile away. Plenty of time to take your foot off the accerator and call your wife and find out what's for dinner before you even drive by the cop. Laser is a shorter distance.JumpRun said:Just Curious, never having had any excperience with the things, how much time do you have to react when the buzzer, beeper, or whatever goes off ? And, have they ever saved you when you were really haulin ass ? Thanks...