That's a radar with a scrambler inside of it. I have one. Erm, shut up and finally.... Doing speeds like this puts people in danger, including yourself. IF someone doesn't recognise the speed you're doing and pulls out infront of you then it's likely that you will picked up with a bucket and sponge. Also doing over 100mph in the UK can have your license taken away from you instantly and you can serve sentences in prison. I've gone up to 170mph in my mates evo and we only reached that speed to see how fast it would go, if you looked to the side of the car everything just disappears into the rear view mirror.