Emergency Survival Whistle - Titanium whistle with loud and crisp sound Maximum sound intensity of 120 decibelsthat can easy to attract peoples attention In certain risky situations. Titanium Whistle - This whistle is made of Titanium alloy,which is resistant to corrosion,lightweight,sturdy and durable. Easy to Carry - This whistle has a small and portable body, can be worn around your neck on the lanyard,attached to your keys or backpack.Size: 2.28x 0.39(58mm x 10mm),weight:0.35oz(10g). Wide Use - It is a useful whistle,you can carry it when camping,hiking,hunting,fishing,boating and other kinds of outdoor activities.Also is a signal whistle for coaches,referees,linesmen and animal trainers. Useful Whistle - This defense whistle suit for women,men and kids. Are you worried about any emergency that may threaten you or your loved one personal safety The titanium emergency survival whistle is a great self defense tool when you going out. Features - Transmit signal/information,When there is an emergency and the mobile phone loses its signal, the whistle can attract peoples attention. - Make a sound to deter and warn threats that may cause harm. - Easy to carry,you can hang it on your neck, keychain, wallet or backpack.Not take up space. Specifications: Size: 2.28x 0.39(58mm x 10mm) Weight:0.35oz(10g) Material:Titanium Alloy Stainless steel chain:2.72/69mm