Trip wire alarm for security system with early warning[REUSABLE]: Trip wire perimeter alarms can be reused indefinitely and can be deployed on any path, entry area, connected to doors, gates, etc.<br> [EARLY WARNING SYSTEM]: Enhance perimeter security on private property, campgrounds, farms, barns, or restricted areas, and alert for perimeter intrusions.<br> [SIMPLE AND RELIABLE]: Trip line alarm is easy to set up, simple and effective, yet reliable, and are a cost effective solution to alert you to intruders.<br> [HOW IT WORKS]: Multiple trip wires are used on a single device to provide a trip alarm with 360 degree whole coverage. When the alarm is activated, it emit a loud audible alarm. NOTE: Our device not harm anything, itand#39;s just designed to make a loud sound to remind you to keep safe,Any question please let me know, we reply with a proper solution within 24 hour.<br> [APPLICATIONS]: Olive green color, ideal for wooded areas, can be used in buildings, yards, courtyards and building exteriors, easily attached to trees, posts or frames by screw holes or zipper cuts.<br> Specification:Item Type: Perimeter Trip Alarm<br> Weight: . 148g/5.2oz<br> Product Size: . 3.2x2.4x9.5cm/1.3x0.9x3.7inch<br> Colour:black<br> Material:Metal<br> Package Contents:<br> 6 * Perimeter Alarm<br> Only the above package content, other products are not included.<br> 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.