I'm selling one Smart Kid Belt because I only used one from a two-pack purchased at Costco. *This listing is for one belt and the instruction manual only. The box is not included. The only portable child seatbelt in the world recognized as E-mark compliant in Japan. Product Name: Smart Kid Belt Target Age: 3-12 years old Weight Range: 15kg-36kg ◆This is a new, unused item, but it has been stored at home, so please understand this before purchasing. ◆Shipping will be via Yu-Yu Mercari. ⚠️I apologize, but I will not be accepting price negotiations or holding items. Thank you for your understanding.