I purchased this with the intention of using it in a taxi on the highway, in case the taxi didn't have a child seat. Fortunately, the taxi was equipped with a child seat, so I didn't need to use this. It's simple and easy to install. It weighs only 135g, is lightweight and portable, and is easy to attach and detach. I think it's a good item to bring with you when you go out, so you can ride safely in vehicles. The applicable weight is 15kg to 36kg. It's new and unused, but it has been stored at home and carried around. To avoid any problems, I would like to sell it to someone who is not looking for perfection and is not overly sensitive. Thank you very much.