Product name:Whistle Product size about : 5.7*1.8cm/2.2*0.7in Product color: As shown in the figure Product material:Stainless steel product features: 1. This dual-frequency high-frequency stainless steel whistle has a survival emergency function, which can send out high-frequency signals for help in outdoor emergencies. 2. The design is exquisite, the product size is small and easy to carry, and it can be easily hung on a keychain or a backpack, ready for use anytime and anywhere. 3. Made of stainless steel Sturdyof, ensuring normal use in various harsh environments. 4. The product has a dual-frequency function. In addition to the high-frequency distress signal, there are other functional modes to choose from to meet different emergency needs. 5. The whistle is clear and loud, and can transmit signals over long distances, helping you get help faster in the wild or outdoor emergencies. 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 contact us at any time. We will give you some suggestions, but for your reference only. Shipment includes: 1 pc Whistle