1. Material: aluminum alloy 2. Applicable to: competition, traffic command, training 3. Decibel: 120 decibels 4. Dimensions: 5.9 x 2 x 1.1 cm 5. Weight: 16g/piece 6. Made of aluminum alloy, sturdy, waterproof and wear-resistant 7. Dual-cavity combination design, high-decibel popping sound 8. No gaps in the whistle tube, no gaps, dirt resistance
