V1 also spazzes more but you have 3 different modes to use it in. One black certain bogies and wrans you if its a serious threat, the other accepts all bogies and I forget the other one. Something the other people have forgotten to mention is the fact that it counts how many things are making it go off. If you are going home and it goes off at the same spot every day, you will begin to ignore it but if a cop knows where the place is, he can sit there and radar knowing thet you will probably iognore it. Valentine tells you and if there is more than usual, then you know...