This is the "Comfort Wheel Board," a stroller accessory exclusive to Bugaboo. It's a convenient step board that allows you to turn your stroller into a double by letting your older child ride on it. [Condition] There is some general signs of use (minor scratches, scuffs, etc.) including the wheels, but the operation is smooth and does not impede movement. It has been lightly cleaned and disinfected. Please be sure to check the condition in the photos. [Product Contents] Board main unit Dedicated seat (removable) Swivel wheel *Box and instruction manual are not included. [Shipping Method] To minimize shipping costs, the item will be packed and shipped with each part disassembled. Please assemble it yourself upon arrival. [Tools Required for Assembly] The following tools are required for assembly: Phillips head screwdriver (used to secure the seat post) *The wheels and board connect with a click system and do not require tools. [Compatibility] It can be directly attached to many Bugaboo models (Bee 5, Bee 6, Fox, Ant, etc.), but some models may require a separate dedicated adapter. Please check compatibility with your stroller on the official website or other sources before purchasing.