The MUSICBRIGHTING Seven Jack-2WD Trolley is full of style and multipurpose. It has fantastic graphics with fiber optic headphones that you can turn on whenever you want through the appropriate button and in a few simple moves from trolley to backpack and vice versa. The trolley has a reinforced bottom and corner protectors that give stability to the trolley and protection to the contents. You unhook it and you have a washable backpack (by removing the insert on which the fiber optic device is placed), maxi roomy, equipped with a front pocket and bottle pocket, comfortable to wear thanks to the padded back and shoulder straps. Shoulder straps that, if used as a trolley, can be retractable or, thanks to the CROSSOVER SYSTEM, lift automatically by pulling up the resistant double telescopic bar with two height adjustments, preventing the straps from crawling on the ground. Finally, with the 10 cm maxi wheels, dragging the Seven Jack-2WD MUSICBRIGHTING Trolley along all the routes of your day is very easy. OTHER INFORMATIONCacapity: 34 LTDisensions: 51 x 37 x 27 cmFeatures: 3 POSSIBLE USES: 1) Use of trolley with shoulder straps that are totally concealed in the backrest. 2) Use backpack without unhooking the trolley. 3) Use backpack when completely unhooked from the trolley with new release system. Warranty: 2 YEARSSchienal: Preformed ergosystem with integrated bottom. Shoulder straps: Padded and covered in fabric with breathable mesh. CROSSOVER SYSTEM: with clips for hooking the tapes. Pockets: Front pocket. Internal bottle pocket. Fabric: Resin-coated polyester fabric.