A great whistle for all dogs and recall training. The Acme 211.5 whistle has a medium high pitch and a single note. It’s a good alternative command whistle to the 210 and 210.5. Preferred by Labrador and Retriever trainers but suitable for all breeds. Good distance whistle.
The Acme 210 whistle needs a good sharp blow. They will sound weak and ineffectual if they are blown in a gentle, drawn out way. They are designed to be on or off with no in between.