Large Sound Whistle: whistle keychains can make a large and bright sound that can be heard at a distance, available for a variety of emergency situations, can let others quickly confirm your location and get a quick rescue
Wide Range of Applications: the emergency whistle keychain can be applied in various occasions, including camping, hiking, hunting, mountain climbing, boating and other outdoor sports activities, also suitable for referees, lifeguards, dog training and so on
