1-a set of large wrista on parents one of the wrist,adjust good tightness and paste the velcro2-a set of small wrists on baby one the wrist,open double buckle tape, paste long tape first,then the short tape ,fasten it to prevent the baby open the tape3-comfortable wearing can't tie hand 4-the wrist can rotate 360 degree without restriction5-keeps child safely near your side6-the wire made of steel can't be cutting and cote with plastic