E-whistle with wwo different tones plus SOS mode selectable by user is easy to use: operated by single hand, hand grip strap design for easiler grip on hand. Addition color ring and lanyard provided to replace the hand grip strap if not in use. Special design of metal-tubing to reach 125dB+/-5dB loudness. Handy & Hygienic without blowing the whistle suitable for all sporting events. SOS mode include S-O-S Morse code automaticall when emergency situations whom indangous and need help. Multi-propose use suitable for: Referee, Coaches, Traveler, Adventurer, Guides, Cheerleaders, Lifeguards, Teachers, Traffic Guides, Dog Trainers etc.
AAA battery is not included in a kit, should be purchased separately.