The perfect compact camp security kit! our 209 micro alarm with 85ft of kevlar line on a reusable reel! These are perfect for those who want something small and easy to carry. Don't let the size scare you away! These are super loud when used with 209 primers and super easy to use. Made completely of rustproof high-quality materials and built to last many uses. Only 4-1/4" long X 9/16" in circumference and weighs only 32 grams! We pride ourselves on having the best quality tried and true perimeter alarms on the market. We were also one of the first manufactures of the 12Ga perimeter alarms going on 16 years now in the makings! This trip alarm is made to last with a high quality aircraft grade aluminum body with brass and stainless steel internal mechanism. Works great for perimeter defense of your home, office, farm, barn, campsite and more. Also works great for fun in games such as paintball!