Search for threads about the Viper alarm. I've had mine for two months now and it's great. I wanted a remote start and when I did some research, found the Viper 791XV which has the remote start and alarm system, both have two way feedback to the responder remote--up to about 2500 feet, and it will tell you if you are too far away. It will also tell you which sensor was triggered. You can get more info on it or find the nearest dealer at
www.directed.com.