Ships from Hong Kong. Emergency Survival whistle is great for any situation and it lets out quite a blast. Great for boating, camping, hiking,personal safety.And it also can be used to train your dog. Size approximately:2.24*0.75*0.35 inches (57*19*9mm) Great for emergencies, survival, or disaster preparedness Stainless Steel whistle with keychain is easy to carry color may vary because of lights It also could be a normal whistle,you can use it to train your dog