Description: Just light blowing that can sound, the volume is high, which it is very practical. Regardless of the water in or in any harsh environment, it can be used regularly, while not likely to rust. Constructed of titanium alloy, it is sturdy and durable, and at the same time has a beautiful and exquisite appearance. Reasonable orifice design makes it easy to convert outer gas and enables louder sound. It is made from titanium alloy, is durable to use. There is one size of the product to choose from. Suitable for outdoor survival, and can also be hung on the keychain with you. Item Name: Whistle Material: Titanium Alloy Features: Smooth Edge, Reliable, Anti-rust Color: Silver Size Details: Whistle Size: 5.4cm x 0.9cm x 0.9cm(Approx.) Lanyard Length: 15cm(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Whistle 1 x Lanyard