Are you looking for emergency whistle? Made of titanium material, the whistle is 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. Features -Color:Silver -Material:Titanium -Size:5.50X0.80X0.80cm/2.16X0.31X0.31in - Suitable for training dogs, coaches, athletes, etc. This whistle can be widely used. - Made of titanium material, this emergency whistle is durable and not easy to deform. - High-frequency whistle can transport sound over long distances, suitable for outdoor rescue. - This emergency whistle is small and lightweight, easy to carry, convenient to use. - Not only suitable for training and rescue, but also for outdoor hiking, travel, other activities. Package list: 1 x Whistle