This lightweight, compact whistle is ideal for dog training, by both the professional and the pet dog owner. The benefits of whistle training are: high frequency sounds tend to be more 'attention grabbing' than a human voice; Commands can be delivered over a much greater distance (ideal for training gun dogs); easier to standardise commands between handlers; Emotion never shows (a whistle never sounds angry!) Recommended by Dr Roger Mugford and other leading trainers. Comes with a free training guide.