Dog Alpin Alpin-281003 dog training whistle
Continuous sound - it should not vary too much when you blow it at different times
Transported correctly - your dog should be able to hear a clear whistle at distances up to 200 meters. Strong, rigid construction
Washable - Put it constantly in your mouth!
Easily replaceable - if you lose it, you do not want to have to retrain your dog in a different tone