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.Hidden: The alarm is in the color of olive grass,which is perfect for heavily wooded areas and can be hidden. 5.Simple Connection: The alarm device can be 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 use Colour:B:green Material:Metal Package Contents: 1 x Perimeter 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.