My RV is parked under dusk to dawn lighting and I had a Viper 350HV alarm installed. Nobody has messed with it during the three years I have had it. Bought the alarm at Best Buy and they did a decent job of installing it. If someone only bangs on the RV windows the shock sensor will cause the alarm to chirp four times as a warning. If you do a search of Viper alarms on line you should get all the info you need. It has a lot of features I like and no problems as of yet. When we are camping I put the alarm in the "valet mode" so it only acts as a door lock/unlock so no alarms while we are sleeping or walking in it. Works great.