Its tough wheels will also take on any terrain beyond the city limits. Pair it up with the comfy seat (included), Carrycot or car seat and release your inner adventurer! One push of a button is all it takes: the Quinny Buzz Xtra unfolds automatically, thanks to the unique gas spring. You will love how easy it folds, too! Buzz Xtra comes as standard as a 3 wheeler pushchair in the UK. You can buy an additional accessory to make it a 4-wheeler pushchair if you desire.