ITEM NAME:Emergency Safety Whistle Dual Frequecy High Decibel Survival Signal Float Description: Lightweight and non-corroding whistle which will float in sea water. Multi-Function whistles for referee teacher lifeguard, or anyone who needs a safety whistle in emergency. Two sound chambers design, high pitched noise maker, audible over 1 mile, easier to be heard, work great as signal whistle. Can be used either with a lanyard or clipped directly onto an application. For school gym, camping, hiking, training, hunting, football, basketball, game,etc. Specification: Material: Plastc Length: approx. 6.7cm/2.6inch; Width: Aprox. 1.8cm/0.7 Clip Length: approx. 8.3cm/3.3inch Package Includes: 1 Piece Whistle with Lanyard SKU: DMO0016797165010430.Lightweight and non-corroding whistle which will float in sea water. Two sound chambers design, high pitched noise maker, audible over 1 mile, easier to be heard, work great as signal whistle. 1 Piece Whistle with Lanyard.