[Take precautions] - The perimeter trip alarm device protects your home, campsite, and property by setting up fences around them, to prevent upcoming dangers in advance. It can be quickly deployed throughout the entire walkway and entrance area, connecting to gates, doors, etc. Perfect for camping, hiking, games, and even home protection, it is the perfect device for outdoor enthusiasts, survivalists, or campers. [Working Principle] - This camping trip alarm signal device No.22 uses a low hidden trip wire attached to the device itself. When the activation pin is pulled, it will emit a loud audible alarm. The multifunctional and reusable wire can activate the No. 22 empty . It is easy to install and is the perfect solution to alert you to intruders. [Easy to use] - The No. 22 billet trip alarm can be easily installed on trees, columns, or frames through screw holes or zipper slots. You can install traffic alarms around campsites, farms, barns, or restricted areas to prevent unnecessary intrusion. After deployment, it will keep coyotes away from livestock; Prevent thieves from entering your home and dangerous animals from entering your camp. [Reusable Trip Alarm]-The perimeter alarm is entirely made of rust high-quality aluminum alloy,can be triggered by springs,can be reloaded, and can be reused indefinitely to your property and personal .It can be reliably used thousands of times and is the most advanced alarm in the market,which can improve the of your property.Every camping enthusiast or anyone who needs to effectively protect their property should not miss this peripheral trip alarm device [ Kind reminder ] - Our perimeter three line alarm system is only for outdoor use. Please from materials and use it with caution. Our device is not designed to harm anything, it isonly designed to generate loud noise to remind you when you need it. Colour:ArmyGreen Material:aluminum alloy Package Contents: 1 * trip alarm Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.