The fiber optic fabric is powered upon pressing the “illuminate” button located on the inside wall of the bag. This fabric comes with 10 unique light show settings! Continue to push the button to pick your desired lighting affect. To charge your bag, remove the light controller from the “illuminate” slip pocket. Please use the included USB cord to plug into your power source of choice. Please charge the lithium battery in your bag for 1 hour before use. Please refer to the hangtag for additional instructions. Battery lasts approx. 7-8 hours **Please note bag contains a lithium battery which may not be allowed on certain Airlines. Please check with your airline if you plan on traveling by air with your bag** Exterior Dimensions: 18" x 6" x 11.5" • Front zipper pocket • Side pockets • Zippered Stash pocket • Separate velour sunglass compartment • Ergonomic mesh back padding • Adjustable Straps for custom sizing • Gold zippers with metal hardware • Metal "Sprayground Authentic" badge • Slide through back sleeve connects to carry-on luggage to free your hands Interior Separate velour laptop compartment • Mesh organizer pocket