High pitch Quiet to the user Preferred by Spaniel owners but an excellent all-round dog whistle High pitch, quiet to the user, preferred by Spaniel owners but an excellent all-round dog whistle for close and distance control. Single frequency. This whistle is recommended for both use in Town and the Countryside . 3 Pack Medium-high pitch, single-note, preferred by Labrador and Retriever trainers; good distance whistle.