You will receive 4 whistles with lanyards. This whistle adopts two sound chambers, so it can reach 120 decibels very quickly. The sound is super loud and smooth, so you can listen to it anywhere.The unique design makes our whistle float on the water. Most of the pipes sold in the market cannot swim or play properly when wet. With our floating whistle, you will feel safer.The keychain and clip design on the back make it easy to use. You can put them in your pocket or wear them around your neck to free your hands. Made of high-impact ABS, you can use it for many years.You can use our whistle as a boat whistle, swimming whistle, kayaking whistle, surfing whistle, hiking whistle, water survival whistle, camping whistle and other outdoor whistles.