This car seat adaptor allows you to attach 2 car seats to your dot or sport with the auto stop safety brake stroller it attaches to the double kit rear position only features move capsule car seat from car to stroller without disturbing baby while your second child sits in the stroller simple click car seat loading on to your stroller makes your stroller suitable for twins or a toddler newborn as a travel system compatible with dot and sport with auto stop safety brake strollers