Made of premium titanium, the whistle is solid and durable. With loud sound, it is suitable for outdoor sports, like hiking, camping, climbing, etc. It is also for daily exercise, like pet training, football, basketball, soccer, hockey or others. With mini and portable size, wrist strape decor, it is easy and convenient to take it anywhere you want. Feature - ColorAssorted Color - Material: Titanium alloy. - Size: About 9x2.1x1.5cm. - Made of premium alloy material, the whistle is solid and durable. Not easy to deform and rust. - Emergency survival. Suitable for outdoor sports, like hiking, camping, climbing, etc. It can be used to call for help if there is an accident. - Daily exercise. Suitable for pet training, football, basketball, soccer, hockey or any other exercises. - With wrist strape hanging and portable size, it is easy and convenient to take it anywhere you want. It can be attached to a lanyard or a key ring. - Lightweight but loud enough. The sound can be heard from far distance. - Warm Tip: Dear buyer, due to lighting effect, monitor’s brightness, manual measurement, etc., there could be some slight differences in the color and size between the photo and the actual item. Sincerely hope that you can understand! Thank you! Package list: 2 x survival whistle