ACME Double Tone Whistle No. 640 Black with Free Leather Pipe Band (90 mm, 640, Black)

DUAL TONE FUNCTION - Combines clear call tone for recall and trill tone for stop or attention signals, easy to select by turning the whistle. Standardized Frequency - Both Models No. 640 and No. 641 sound identical within their range, ideal for consistent training signals for multiple users or spare whistles. High Range - Powerful, clear sound that reliably bridges long distances even in wind, rain or noisy environments. Leather Strap - Included for comfortable and secure wear around your neck or on your gear. LIGHTWEIGHT AND WEATHER RESISTANT - Made from durable materials for everyday use during training, hunting or walking