In a single click, your YOYO² (sold separately) turns into a double stroller with this accessory that hooks onto the back of your stroller. It comes with up to five different possible setups from birth to toddler. Compatible with Babyzen YOYO² stroller (sold separately) Unfolded: 34.3"L x 17.3"W x 41.7"H; 17.3" width For children up to 48.5 lb. Four-wheel brakes Plastic Imported