Our banger signal kit includes everything you need for the back country. The four bangers that are included are great audio signals as well as animal deterrents. When launched, the bangers will fly about 125 feet, then explode producing a shot gun like blast. This loud blast is ideal for signalling others to your whereabouts or to scare off unwanted animals such as bear, coyotes, and deer (bucks are not as friendly as Bambi in the fall, and account for more injuries than all other animals combined in parks). Our kit also includes our waterproof case which contains all the contents, and can be carried by the supplied belt clip or carabineer. For those walks in bear country, a banger can be fastened onto the launcher, then safely mounted on the outside of the case. The readied launcher can not be fired when locked into the outside of the case, and can be removed quickly and easily for use. These products can not be shipped through the mail and have to be sent through courier. Average cost is about $25, but please just send us an email and we can put your order together and make sure your taken care of. The reflective instructional sticker on back can also be used as a signal device.