Can be used as a push stroller or a bike trailer. To lock/unlock the front wheel the pin pulls out and twists. Easy way to transport and include your dog that may be too young, old, or injured to keep up with you and your daily activities, but still want to include them! Fabric screen windows provide lots of ventilation. Reflector allow for safer night time riding. Includes a hand brake. 46" x 26" x 41". Weight Limit- 66lbs