The Byrna Banshee: a military-grade, 130dB* personal safety alarm capable of producing an ear-piercing alert that draws attention to you and thwarts potential attacks. Packaged with a carabiner that conveniently attaches to the Byrna Banshee to backpacks, purse straps, and pant belt loops for quick access during emergencies Durable, water-resistant Replaceable batteries that last up to 1 year a Ideal for students, adults, seniors, and outdoor enthusiasts *130dB is equivalent to hearing a military jet aircraft take-off from 50 ft. away