[Target audiences] 18 months and up to 24.3 lbs (11 kg) (If this product does not have a jaw, it cannot be used if there is no room between the product and the neck of your child). Note: Please read the official Japanese guide (instruction manual) before use. The scalloped neck ring is a training tool for sports training. Not a lifesaving device. If you experience any abnormalities during use, please stop using it immediately. This product is not intended for children to use alone. Please do not leave your eyes off during use, and if there is any abnormalities, please use in a situation where parents can respond immediately. Please do not use this product when parents take a bath with their children, washing their own hair or washing other children, as they may cause their eyes. Make sure that the belt is not removed, close the air line and check whether there is an appropriate amount of air or air leakage. If there is any abnormalities, please stop using it immediately. Please use and store the air pump components in the mouth and eyes of your baby. Inflating too much air or using a high pressure pump may cause damage (it is a good amount of wrinkles left around the perimeter). Please use the product in a water depth that your child can stretch their feet and put them on the bottom. If used in deep water there is a danger of this product falling off or causing the childs neck to be tightened. Use in shallow water may cause children to fall over or drowning water. Please do not leave it under the blazing sun as the main unit may become soft; (In such cases, please do not add air or make a small amount) Avoid contact with sharp objects such as rock corners, stakes, gravel, shells, glass pieces, metal pieces, wood pieces and other pieces, cigarette and fire.