This is an auxiliary belt for ISOFIX. It can firmly secure seat belt-fixed child seats and junior seats to the ISOFIX points of ISOFIX-compatible vehicles. Since it is an auxiliary belt, be sure to use it in conjunction with the seat belt. It can also be used to secure pet drive beds and carrying cases, but when securing with the auxiliary belt alone, please use it for pets weighing 18kg or less. If you do not know how to use it, please refrain from purchasing. We cannot answer questions about usage or vehicle compatibility.