Adjustable in size, worn in the form of a belt safety buckle at the waist, can move 360 degrees back and forth, and is securely fastened. 1 x Automatic Inflatable Life-saving Belt. Convenient to use: The automatic model is worn on the body, and in case of falling into the water, the automatic device will automatically start, inflating within 3-5 seconds without the need for manual pulling of the lever.