Product Description ACR Emergency Rescue Whistle WW-3 * Meets USCG/SOLAS requirements * Aids in land or sea rescues * Use on life jackets, vests, foul weather gear, ring buoys, rafts, keychains, etc. * Developed for the U.S. Navy; used by NASA, major airlines and shipping companies * Complete with 18 inch (45.5 cm) lanyard * Size: 1.0 x 2.0 x .25 in (2.5 x 5.0 x .6 cm) * Weight: 1.4 oz (40 g)