Feature 1Early Warning System: This alarm can alert for perimeter incursions and enhances perimeter security on private property, campgrounds, farms, barns or restricted areas. 2360 Coverage: Multiple trip wires on a single unit provide 360 coverage with a trip alarm that sounds loudly when the alarm is activated. 3Reusable Design: Perimeter trip alarm is unlimited and reusable and can be installed in paths, entrance areas, connected to doors, gates, etc. 4Easily Hidden: The alarm is in the color of olive grass, which is ideal for heavily wooded areas and can be easily hidden. 5Simple Connection: The alarm device can be easily attached to a tree, post or frame through screw holes or zipper cutouts.Item Type:Perimeter Trip AlarmMaterial: Aluminium alloy .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Product Size: Approx: 4.7x2.5x9.6cm/1.85x0.98x3.77in(height adjustable)Package List1 x Perimeter Trip Alarm1 xIron Sheet1 x Pull RingNote1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.