Description: Fabric: TPU composite fabric. It is small and compact and easy to work in the water compared with the traditional life jackets. It can be used repeatedly, just deflate the balloon, fold it and put it back into the pouch. And replacing CO2 cylinders, your bracelet is ready to work again. Buoyancy Design: The overall buoyancy design is reasonable and has longer life. It is more convenient for you to float safely in the water, buoyancy stronger and up to 170 Newton that can withstand 120KG weight of adults.Simply wear anti drowning bracelet on the left hand and turn the , it will be inflated in 1-2 seconds with the CO2 cylinder and pull you up from deep water to water surface when accident happens. Survival Whistle: Comes with high-quality metal high-frequency survival whistle sound range 500m. Safety Elastic Buckle: The wrist part is equipped with high strength tensile type safety elastic buckle. Snap makes every user feel safe and comfortable. Elastic self-regulation is suitable for all kinds of arm thickness of the crowd. Locate the Direction: Equipped with a compass, so that people can be rescued in the vast waters to quickly locate the direction. Specification: Material: TPU SizeApprox.12*8cm / 4.72*3.15inch Wristband LengthApprox.23cm / 9.10inch Wristband Width: Approx.2.1cm / 0.83inch Color: Black Package Includes: 1 Piece of Anti Drowning Bracelet Note: This is not suitable for children under 15 years of age. Please check again if the Co2 tank is installed on the ring hand before it suffers. Not toward the face or body when it opens. Do not repair yourself. Do not put the CO2 tank under direct sunlight and hot room temperature.