If you have an emergency or you're stuck in a place where your screams won't be heard the Adventure Medical Slim Rescue Howler will call help over your way. The howler makes an impressive 100 db signal that can be heard from over a mile away. And packet of two super light to carry. These howlers are guaranteed to work in any weather conditions as they pea-less design means there aren't any parts to get stuck or freeze up. Bring a couple of these so when you're lost these howlers will make your call for help much louder and more effective.