Features1Multi Functional: 7 in 1 whistle has a reflector and storage compartment inside, but also has a magnifying glass and compass, thermometer, LED light 2Widely Use: 7 in 1 whistle is suitable for emergency situations in camping, hiking, fishing, boating and other outdoor activities, as well as dog training, school sports, and lifeguarding. 3Attracts Attention: Multifunction survival whistle emits attention grabbing sound with just one blow, penetrating enough to be heard even from a distance. 4 Material: 7 in 1 multifunction whistle is made of ABS material, wear resistant, drop proof, durable, do not have to worry about the journey whistle suddenly broken. 5Portable: Multifunction survival whistle comes with a lanyard, easy to carry and store, not afraid of losing the whistle during outdoor activities.SpecificationItem Type: 7 in 1 Multifunction WhistleMaterial: ABSBattery: Built In Button Cell Model LR41 Capacity 25mAh Shipped with Built In BatteryPackage List3 x Multifunction Whistle