Amzonly Emergency Whistle, 120db Safety Whistle Survival Shrill Loud for… Dr. Shoesert -Emitting a focused beam of

-Emitting a focused beam of 256 yards

no need to disturb your neighbors

5 hours (USB 5V/1A input) or 4 hours (12V DC input)

interior aging

Meets EM-71 (CE) and ASTM D4236 safety standards

Amzonly Emergency Whistle, 120db Safety Whistle Survival Shrill Loud for… Dr. Shoesert -Emitting a focused beam ofA practical whistle or safety gear for outdoor work and recreation. Chosen from Amazon's better selling, well reviewed options in this category. Very Loud: A whistle with a two tone chamber increases the sound power to be heard from a mile away and acts as a signal whistle. Straightforward to use and easy to pack with the rest of your kit.