What could be better than hitting the open road with kids in tow experiencing the sights and sounds of the outdoors together? The Aosom   3-in-1 bike trailer is perfect for that golden time when they're starting to get inquisitive about the world around them but not quite old enough to ride on their own. For parents it's a chance to maintain their active lifestyle even after having kids. Aosom child bike trailer got your covered on your way. Features: - 3-in-1 design, easily convert between baby stroller, jogger stroller and trailer - Durable yet lightweight aluminum construction is strong enough to support 2 kids and each less than 40 lbs of weight(trailer) or less than 33 lbs of weight(twin stroller and jogger stroller) - There are anti-flank impact device on both sides to add the security for your baby - Hand-lock brake system allows you to lock the stroller easily - Large rubber inflating wheels with shock absorbing system, provide the smooth riding process - An observation window on the top allow you know your baby's status in real time - The handlebar height is 4-level adjustable from 31'' to 46.5'' - The backrest of the seat can be adjusted moderately - Lightweight frame with foldable design for easy storage and transportation - Ideal for children between 6 to 36 months Specification: - Color: Red, Grey - Material: Aluminum, Oxford, Rubber, PVC - Overall Dimension: 59" L x 33.5" W x 42.25" H - Inner Space Dimension: 32.75" L x 22.5" W x 29.5" H - Folding Size: 39.5" L x 11.25" W x 27" H - Handlebar Height: 28.74" - 46.5" - Storage Pocket Size: 17.5" L x 9" W - Certification: ASTM F833，CPSIA