SAFER: This camping trip alarm can be installed in campgrounds, farms, entrance areas, gates, restricted areas etc. It can enhance perimeter security for your property and yourself. keep dangerous animals out of your camp site. (Note: Our device will not harm anything, it's just designed to make a loud sound to remind you to keep safe) EASIERE: This Trip alarm security 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. The perimeter alarms are spring triggered, reloadable, and endlessly reusable for your property and personal security. WIDE COMPATIBLE: The 12 gauge camping trip alarm built for perimeter defense, you can use it with 12ga blanks or 12ga flares. And you can use the 209 primers with a 209 adapter, 22 primers with a 22 adapter, 308 blank with a 308 adapter for this device(Note: these accessories are not included but you can get them in any shop). HIGHER QUALITY: this perimeter alarm is made with matching 6061 aluminum recycled aluminum and rustproof body. camping trip lover or anyone who needs to protect their property effectively shouldn't miss this perimeter trip wire alarm device. WARNING: Do NOT use live ammo. Please keep away from flammable materials, and use it with caution. Colour:black Material:aluminum type: A Package Contents: 5 x camping trip alarm