The JetScream Whistle is a low profile, pea-less whistle for survival, safety, and communication purposes. This exceptional whistle focuses manmade air streams through harmonically tuned chambers to supply a piercing shriek audible over such a lot other natural and manmade noises. Since the whistle is pea-less, JetScream even works when wet, so it’s the easiest accompaniment to all outside activities near rivers, lakes, or oceans. Slim enough to slot in your pocket and attached to a lanyard, the JetScream is just as practical within the city as it’s within the woods. The JetScream is included within the survival kits of one of the most such a lot elite government forces, including america Air Force and the Navy Seals. Length: 2.3″. Wt: 0.3 oz.