Features:1. Protect homes, camp sites, and property by setting up a perimeter around your area and setting it with blanks to alert you when someone, or something, breaches their area.2. Install the camp safety alarm securely on a fixed surface. Tie the trip wire to the trigger pin and secure it to the trespass wire. Wire, rope, or nails can be used for installation. Simply use the edge or hole on the alarm.3. Load the signal device (according to the situation, the use of flares, bear deterrents, etc.). Load the signal device into the alarm and pay attention to the balls support. Keep any signaling device you use tight so that it won't fall out when sitting in the environment for long periods of time: balls bearings in alarms.4. Depending on the signalling device used, its sound level can range from 125 dB to 175 dB. Each adapter has its own noise level, but they can all be used in the same device, giving you more loading options.5. Double check to make sure it's what you want. Our device is not meant to hurt anything, just to make a loud noise to alert you when you need it. The best gift for outdoor and travel lovers. The package includes 1 x peripheral trip alarm, 1 x trigger needle, and 1 x pull ring.Specification:Material: Aluminum AlloyProduct Color: Dark Green Product Size: 7.6 x 2.5 x 2.5cmProduct Weight: 140g Package Included:1 x Perimeter Trip Alarm