Babyzen YOYO Adapter Used for about 3 months for 2 children. I think it can still be used without any problems. The condition is that there are a few minor scratches, but please refrain from purchasing if you are concerned. * The button part has yellowing and dirt due to aging (photo 5). * There is blue staining on the top (photo 6). Used when attaching a Maxi-Cosi, etc. to the YOYO. There are no instructions or box. Please check YouTube or the official website for how to use it.