Seven In One Emergency Whistle, Loud And Crisp Whistle, Multi-function Whistle, With A Tethered Compass, For Survival In The Wild High quality and easy to carry: 7-in-1 emergency whistle is made of ABS high-strength material, light weight and anti-falling. The multifunctional whistle can work well under any conditions and has excellent airflow design. It has a long rope. You can tie it on your backpack or hang it around your neck. Multi-functions: The seven-in-one security post has seven functions, including emergency post, compass, thermometer, flashlight, magnifying glass, reflector and sealed warehouse. Unique storage cabin: The sealed cabin can store important personal information, such as your name, address, telephone number, blood type, etc., so that the rescue personnel can know your situation at the first time. Wide range of uses: the lifeguard whistle is waterproof and can be used in various interesting outdoor occasions. For example, cycling, camping, hiking, mountain climbing, jogging, boating, hunting and fishing.