Set includes: The set includes 6 safety whistles with adjustable reflective lanyards, suitable for personal, family, and team use. ABS plastic material: Our emergency whistle is made of ABS plastic, which is lightweight, waterproof, and durable. Adopting a dual tube design, each plastic whistle can emit high-frequency and low-frequency sounds. Adjustable reflective tape: The reflective design provides high visibility through light exposure in the dark. The emergency rescue whistle is designed with a clip that can be fixed to the belt or life jacket, and the length of the rope can be freely adjusted. Bright Colors: These whistles with lanyards are designed to be noticeably orange, bright, and can attract attention from the outside world, making it easy for you to be noticed. Easy to use: These whistles are easy to produce high pitched sounds and can be heard from afar. They can be used for sailing, hiking, boating, kayaking, camping, hunting, emergency survival, rescue, and more.