Automobile safety belt is designed for adults, because the height of children is not enough, safety belt often runs through the neck, it's very dangerous in emergency brake or accident situation, easy to get hurt. This special child triangle safety belt adjuster can avoid injury of the neck of children, and avoid being hurt in case of emergency, to give children a safer environment while in car. For the protection of children's safety, this product is used for children over 3 years old, weighing 15 kg or more, the European traffic safety law stipulates that it is necessary for children to wear.