[High Quality & Reusable]: Made of aluminum alloy, the perimeter alarms are spring triggered, reloadable, and endlessly reusable for property and personal security. Trip alarm reliable for thousands of uses. The perimeter tripwire alarm device helps provide peace of mind. [Easy to use]: Easily attached to trees, posts, or frames via screw holes or zip tie notches. The alarm signaling device uses a low-placed and concealed trip wire, tethered to the device itself, which creates a loud audible alert when the activator pin is pulled. [Rapid Deployment]: Can be quickly deployed across paths and entry zones, attached to doors, gates, and more. Deploy to help protect livestock; Install the trip alarm device around campsites, farms, barns, or restricted areas for protection against unwanted intrusions. Easy to set up and a cost-effective solution for alerting to trespassers. [Wide range of applicability]: This versatile, reusable trip line activates a 12ga blank or optional pepper gas and flash bang rounds. Also available with 209 primer and .22 adapter. (Not included). [Important information]: This device is designed only to create a loud noise to alert you when needed. Verify this is the intended use. The perimeter trip alarm system is for outdoor use only. Keep away from flammable materials and use with caution. User assumes all risks and liability for using this product. Style: With accessories Material: Aluminum alloy Color: Army Green Package Contents: 2 sets x Perimeter Trip Wire Alarm Note: Light reflection and different displays may cause the color of the item in the picture to appear slightly different from the real thing. Measurement allowed error is +/- 1-3cm.