Nitecore Single Pipe Emergency Whistle NC. Outdoor Emergency Whistle. Single Chamber. Measures approximately 2" long x 1/4" wide. Weighs only 4. 7 grams (approximately 16 ounce). Maximum sound intensity of 120 decibels. Constructed from a piece of polished TC4 titanium alloy. Lanyard hole. Utilizes a precision Teflon resonator. Lightweight sturdy and durable. Perfect for outdoor events sporting events security and law enforcement. Works in wet or dry conditions. Boxed with hanging tab. Specifications for Nitecore Single Pipe Emergency Whistle: Manufacturer: Nitecore Color: Silver Package Contents: Nitecore Single Pipe Emergency Whistle Nitecore NWS10: Single Pipe Emergency Whistle NCNWS10