This camping travel alarm can be installed at camping sites, farms, entrance areas, gates, restricted areas, etc. It can enhance the perimeter security of you and your own property. Keep dangerous animals out. (Note: Our device will not cause harm to anything, it is just designed to make a loud sound to remind you to stay safe) Simpler: This travel alarm security device uses a low-profile hidden tripwire, tethered to the device itself, which will sound a loud sound alarm when the activation pin is pulled. The perimeter alarm is spring-triggered, reloadable, and can be reused infinitely to safeguard your property and personal safety. Widely Compatible: 12-gauge camping travel alarm built for perimeters, you can use it with 12ga blank flares or 12ga flares. You can use 209 primers with 209 adapters, 22 primers with 22 adapters, blanks with adapters (Note: These accessories are not included, but you can get them at any store). Higher Quality: This perimeter alarm is made of matching 6061 aluminum recycled aluminum and rust-proof body. Camping travel enthusiasts or anyone who needs to effectively protect their property should not miss this perimeter tripwire alarm device. Warning: Do not use with electricity. Please stay away from the material, and use it with caution. Color: Black Material: Aluminum Type: A Package Contents: 2x Camping Travel Alarm Only the above package contents, other products are not included. Note: Light reflection and different monitors may cause the color of the item in the picture to be slightly different from the real thing. The measurement allowable error is +/- 1-3 cm.