1. Two different whistle tones selectable by user.
2. Easy to use: operate by single hand
3. Strong loudness same effect as traditional whistle.
4. Special design metal-tubing to reach 125dB +/-5dB loudness.
5. Handy & Hygienic without blowing the whistle
6. Suitable for all sporting events.
7. Alert for emergency situations where a threat to persons exists.
8. Multi-propose use suitable for: Referee, Coaches, Traveler, Adventurer, Tour Guides, Cheerleaders, Lifeguards, Teachers, Traffic Guides, Dog Trainer…