The 7-in-1 Safety Whistle has 7 functions, including emergency whistle, compass, thermometer, LED signal light, magnifying glass, reflector and a sealed magazine with good playability (the uniquely designed built-in miniature storage box can be used to store important personal information, so that rescuers can understand your situation at once) (NOTE: If you need help in an emergency, you can try to whistle softly, which is louder than whistling at full volume) Anyone who is interested in adventures, hiking or camping events, need this 7-in-1 outdoor multifunctional safety whistle as birthday gifts for men, husband, father or friends of the boy scouts and to prepare for the next boy scout march and improve outdoor skills. The emergency whistle is made of ABS, high-strength, drop-resistant and heat-resistant engineering material, lightweight and fail-safe, beautiful whistle works well in any conditions with excellent airflow design. This survival whistle comes with a long enough lanyard, which can be attached to your backpack, belt or neck. Different whistles are included for keychains and lanyards, which are easy to match, and the lanyard can easily go through backpacks, sailboats, camping gear, life jackets, kayaks, PFD, paddleboards and bicycles. You can also attach the whistle to your belt or shoulder strap for quick and easy access in case of emergency. Whistles with lanyard to carry for life safety, cycling, skiing, camping, hiking, jogging, backpacking, hunting, archery, fishing, swimming, boating, kayaking, water sports events and all kinds of outdoor activities.