Package included. One package contains 10 safety whistles with lanyards for team and individual use. High Quality Whistles. This emergency whistle set is made of high quality plastic, very lightweight, waterproof and durable. Double tube design, each whistle can produce high and low frequency sound. Conspicuous Colors. These whistles are designed in a distinctive orange color that is very bright and can attract the attention of others outside, helping you to be easily spotted. Special design. The whistle with lanyard is designed with a clip and a nylon cord that can be secured to a belt or life jacket. The length of the rope can be freely adjusted. It can be easily hung anywhere around the neck and wrist. Easy to use: These safety whistles are easy to make a high-pitched sound that can be heard from a long distance and can also be used for sailing, hiking, boating, kayaking, camping, hunting, emergency survival, rescue, etc.