3 PACK ELECTRONIC WHISTLES, includes batteries and 3 manual whistles with lanyards. Electronic whistles also have lanyards attached. High-volume, clear, powerful, and attention-grabbing electronic whistle-suitable for coaches, referees, physical education teachers, training animals and pets, outdoor camping, emergency help, etc. THREE-TONE ELECTRONIC WHISTLE Three different whistle sound effects meet the needs. You can adjust the volume according to the size of the space or the occasion. Also suitable for boatswain whistle, windstorm whistle, rescue whistle, self-defense emergency whistle. RUGGED PROFESSIONAL ELECTRONIC WHISTLE Safe and non-toxic high-quality ABS material, humanized design allows you to get a good sense of experience in outdoor activities. whether in a noisy environment or in an open area, the sound of an electronic whistle can easily attract the attention. REPLACEABLE BATTERY