-Constructed of mix of sleek 420D jacquard and intense 840D nylon. -Battery-operated speakers. -Padded laptop compartment with file folder. -Second compartment in the middle for books and belongings. -Zip compartment on the top with loads of pockets for accessories. -Detachable phone pocket on the back strap. -Mega-padded back panel. -Dual mesh pockets. -Waist strap finish. -Requires 3 AA batteries (not included). -Overall Dimensions: 18'' H x 14'' W x 8'' D.