Survival Res-Q Whistle w/18" LanyardFeatures:. Gets attention!. Loud, shrill, dual tone audible from great distance. Unique flat design prevents holding water. Required by SOLAS 83. 18" lanyard included. Meets USCG/SOLAS requirements. Aids in land or sea rescues. Use on life jackets, vests, foul weather gear, ring buoys, rafts, key chains, etc.. Developed for the U.S. Navy; used by NASA, major airlines and shipping companies. Complete with 18" (45.5 cm) of lanyard. This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.