- Two different whistle tones + user selectable SOS mode - Easy to use: operated by one hand - Hand grip strap design for hand esiler handle. - Added color ring and lanyard provided (For replacement of hand grip strap if not in use.) - Specially designed metal tube to achieve 125 dB+/-5 brightness dB. - Convenient and hygienic without blowing the whistle - Suitable for all sporting events - SOS mode: Automatically give SOS Morse code in case of emergency who are indangou and need help. - Multi-purpose use suitable for: Referee, Coaches, Traveler, Guides, Guides, Pom- AAA battery. Not included in a kit, must be purchased separately.
