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NEW. Never used. This led motorcycle backpack requires connecting to a power bank for use, but please note that the power bank is not included in the product. Therefore, it is necessary for you to prepare yours separately. 【DIY 】Modify the pattern at will, let the Crelander laptop backpack as you wish. It has a sleek and cool design that's easy to spot in a crowd. 【Material】LED smart knight backpack appearance purchase 3D hardcore waterproof material;the back width using 1680pvc ,48*48 full-color dot matrix screen , support text , pictures , GIF , and other formats ;adjustable shoulder strap size; breathable material for the back 【Expandable Storage Space】With the expandable space,the helmet bag can hold many kinds of motorcycle helmets, full-face helmets, off-road helmets and more. Multipurpose:LED backpack size is about 13.5 * 7.5 * 18.8in which have enough storage. Large zipper pocket as a laptop bag, put a tablet computer;the interior has a number of ind