1. Early Warning System: This alarm can alert for perimeter incursions and enhances perimeter security on private property, campgrounds, farms, barns or restricted areas.2. 360 Coverage: Multiple trip wires on a single unit provide 360 coverage with a trip alarm that sounds loudly when the alarm is activated.3. Reusable Design: Perimeter trip alarm is unlimited and reusable and can be installed in paths, entrance areas, connected to doors, gates, etc.4. Easily Hidden: The alarm is in the color of olive grass, which is perfect for heavily wooded areas and can be easily hidden.5. Simple Connection: The alarm device can be easily attached to a tree, post or frame through screw holes or zipper cutouts.Due to different batches, the appearance, color and printing of the product may be different, which does not affect the useColour:C: greyMaterial:MetalPackage Contents:1 x Perimeter Trip AlarmOnly 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.