[Take Precautions] - The perimeter alarm device protects your home, campsite and property by installing fences around them, to warn the coming dangers. It can be quickly deployed across the entire walkway and entrance area, connecting to gates, doors, etc. Perfect for camping, hiking, military games and even home protection, the perfect device for outdoor enthusiasts, survivors or campers [Working Principle] - No. 22 camping travel alarm signal device uses a low hidden trigger attached to the device itself. When the activation pin is pulled, will emit a loud audible alarm. The multifunctional and reusable trigger alarm can activate the No. 22 vacuum. It is easy to install and is the ideal solution to alert you of intruders. [Easy to Use] - The No. 22 billet trigger alarm can be easily installed on , columns or frames through screw holes or zip slits. You can install traffic alarms around campsites, farms, barns or restricted areas to prevent unnecessary intrusion. After deployment, it