The purpose of a trip line in a perimeter alarm is, once tripped or kicked, a mechanism of alert or deterrent is triggered. Between two anchor points, the wire or line is pulled taut and somewhat low to reduce visibility. An intruder moving through the path of the alarm will come into contact with the wire causing it to trigger the alarm mechanism. Any location could benefit from a perimeter alarm system, but those with larger lots, longer driveways, or other infrastructure interspersed with open space will find that it is especially valuable. These alarms have proven successful while camping in bear country, alerting property owners to trespassers, deterring burglars of detached buildings or basements, and even smash and grabs within vehicles. The number of ways to implement these alarms is many, and who knows, maybe they could save your life.