Come and see our amazing products. The bracelet including 4 pcs CO2 cylinders. The anti drowning bracelet is portable, you just need to pull the rod with your hand, the air will filled into the airbag within 1-2 second, pulling you keep on the surface of water, making you out of danger. The Reusable rescue float drowning airbag very compact, suitable for wearing on the wrist or arm. Made of Aluminum, Polycarbonate (PC).Suitable for all water activities: including diving, swimming, surfing, rafting, kayaking, sailing and fishing, so that you are more free exercise. It also has a built-in compass and whistle to help identify the direction and increase the chances of being found to attract attention.The price includes the shipping cost to ca, QTY over 300pcs by ocean. Pls confirm with us about the packing info, stock color and exact production time before placing your order