it tells you when your already hit with the laser thus making it useless lol… Thats how I got hit a few months ago… was doing like 92 and the v1 went off with the sound it makes when im being hit with a laser and by that time he already got me… saw him pulling out and i pulled over like a 1/4 mile down the road before he even got out of the u turn lol… ended up just giving me a traffic light ticket bc i pulled over and i beat that shit