HIGH QUALITY MATERIAL - The whistle is made of high-quality aluminum alloy material, with polished finish and anti-oxidation coating surface,solid and durable. Not easy to stick dust, not easy to fade, and has a long service life.LIGHTWEIGHT AND CONVENIENT -The whistle weighs only 25 grams, it is easy to carry, and it will not cramp even if you use your hands and fingers for a long time.HIGH DECIBEL - The life-saving signal whistle adopts a double-tube design, which can transmit up to 150 decibels of sound. When used in emergencies and sports referees, distant sounds can be clearly heard. It is very durable and is a good helper for outdoorcamping and hiking.WIDELY USED - Not only is it suitable for emergency situations in sports events, it can also be an outdoor survival call signal, and it is a good item to meet the needs of daily life. It is an ideal choice for any outdoor activities such as hiking, hunting,fishing, boating, etc.PACKAGING AND APPLICATION - There are 2 signal whistles of different colors and two black lanyards in the package. It can be tied to a backpack or hung around the neck for easy carrying and preventing loss. It is a good partner for any kind of outdooractivities.Colour:Black and silverSpecifications:Name: double tube signal whistle.Material: stainless steelSize: length 5.7 cm, width 1.8 cm, thickness 0.8 cm.Weight: 25 gDecibels: 150 decibels.Colour: black and silver.Content:2 x stainless steel whistle.2 x black removable lanyards.