Product name: 7-in-1 survival whistle Product size: 11*3*1cm/4.33 *1.18 *0.39 inch Product color: As shown in the figure Product material: plastic product features: 1.7 In 1 safety whistle has 7 functions, including emergency whistle, compass, thermometer, LED signal light, magnifying glass, reflector and sealed warehouse, and has good playability 2. Anyone interested in adventure, hiking or camping needs this 7-in-1 outdoor multifunctional safety whistle as the best birthday gift for men, husbands and fathers to improve outdoor skills 3. The emergency whistle is made of ABS high-strength, fall-proof and high-temperature engineering materials, with light weight and fail-safe. This lifeguard whistle is equipped with a lanyard long enough to be tied on a backpack, belt or neck 4. For the sake of life safety, you can use lanyards for whistling in cycling, skiing, camping, hiking, jogging, backpacking, hunting, archery, fishing, swimming, boating, canoeing, marine sports events, etc Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact mewe will give you some suggestion, but it is for you reference only. Shipment includes: 1 pc survival whistle 1 pc nylon rope