FITS UNDER MOST AIRLINE SEATS for easy access to belongings en route, please check with your airline for more information as under seat storage capacities and dimensions can vary.Number of wheels:4 FOUR, MULTI-DIRECTIONAL SPINNER wheels allow for 360 rolling in multiple directions for easy mobility USB PORT lets you charge electronics on the go (batteries not included) ERGONOMIC, PUSH-BUTTON LOCKING HANDLE is designed to fit comfortably in your hand QUICK STASH EXTERIOR POCKETS for increased packing organization of smaller items MAIN COMPARTMENT features a padded laptop compartment that fits laptops up to 13.3 inches