【Unmatched Versatility】The 7-in-1 safety whistle has 7 functions, including emergency whistle, compass, thermometer, LED signal light, magnifying glass, reflector and sealed magazine with good playability (the uniquely designed miniature built-in 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) 【The Perfect Gift】Anyone who is interested in adventures, hiking or camping events needs this 7-in-1 multifunctional outdoor safety whistle as birthday gifts for men, husband, father or friends of boy scouts and to prepare for the next boy scout march and improve outdoor skills 【High Quality and Easy to Carry】Emergency whistle is made of ABS, high-strength, drop-resistant and heat-resistant engineering material, lightweight and fail-safe, nice 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 【Wide Range of Applications】Whistle with lanyard to wear for life safety, cycling, skiing, camping, hiking, jogging, backpacking, hunting, archery, fishing, swimming, boating, kayaking, marine sporting events and all kinds of outdoor activities