one of my best purchases ever, viper alarm. the remote has a great range that shows a picture of what is happening with the vehicle. it has a shock sensor that you can have the sensitivity changed on. it also has a field disturbance sensor so i can leave my windows down. automatic start, windows up and down with remote, short run mode(for those with a supercharger or turbo), over/under rev protection, all kinds of specail features. i love it and i feel like my truck, aka BIG MAMMA is safe when i park her.