Essential for Survival: The whistle comes with a high-precision compass and thermometer to know the current temperature and direction in the first place; When there is no fire in nature, you can use the fire magnifying glass attached to the survival whistle to refract sunlight on grass and dead leaves to produce fire. < p>Light signal: safety whistle with survival mirror and high white LED torch. In the event that the whistle cannot be used, the principle of sunlight reflection is used to find rescuers and indicate their current position. The emergency lighting system and the LED bulb have a lifespan of 10,000 hours in the absence of light in the field. High quality: the emergency whistle is made of ABS high strength, high temperature and drop resistant engineering material, lightweight, stylish and with good air circulation. It comes with a lanyard so you can attach it to your backpack, belt or around your neck. SUPER SOUND: A standard high decibel survival whistle with a powerful high frequency detector that provides up to 120 decibels, enough to be heard a mile away and in an emergency you and your whistle will be easily spotted. > Rescue Tape: You can take your own lifesaving tape before you travel: write down your name, address, phone number, blood type, etc. so rescuers can capture you first.