This video shows the build of a really inexpensive DIY tree Mount Dual Tripwire “Low Tech” Intruder Alert System using materials that are easily available.Whether you need to secure the perimeter of your home, camp site, the tripwire alarm will get the job done. In a survival situation trip wire alarms could come in handy to secure your perimiter. If you are camping in the wilderness they could alert you to unwanted animals such as a bear. These trip wire alarms may even scare them away. For your home they will warn you if vandals, or prowlers come onto your property.