Double Tube Explosive Whistle Outdoor Distress Whistle Stainless Steel High-frequency Earthquake Rescue Whistle Survival Whistle

Function introduction:
1.Can be used for personal bird training, outdoor survival, and competition referee use
2.The vocal cavity is not afraid of dirt and water ingress, and can still function in harsh environments
3.Double tube design, up to 80-150 decibels, easy to blow