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DIY Modify the pattern at will let the laptop backpack as you wish. It has a sleek and cool design that’s easy to spot in a crowd. The Crelander LED cool knight smart backpack is suitable for a variety of sceneslike travelinghikingridinggo to school…. Multipurpose:LED backpack size is about 15 7 18in which have enough storage. Large zipper pocket as a laptop bag put a tablet computer;the interior has a number of independent small compartments can effectively store cosmetics tissues keys textbooks mini ipad cell phones umbrellas some sports equipment etc…. Material LED smart knight backpack appearance purchase 3D hardcore waterproof material;the back width using 1680pvc 4848 full-color dot matrix screen support text pictures GIF and other formats ;adjustable shoulder strap size; breathable material for the back Cool Gift The LED Knight Backpack with DIY screen is also the best gift for yourself or others on the Christmas Birthday Valentine’s Day…. How to use Search on your mobile phone or directly scan the code to download the APP plug in the mobile power supply through the built-in USB data port on the back turn on the Bluetooth and scan the QR code to bind the backpack. You can connect the device and use it.. Crelander LED motorcycle knight backpack was specifically designed 3D hard shell and streamline appearance of the body.This laptop backpack increase the aerodynamic force and reduce wind resistance make your ride happier and more relaxed. The backpack with high-brightness LED lamp bead screen no matter day or nightit can alert the rear personnel prevent yourself from being in the blind spot of viewing angle and ensure your safety of riding. Multi layers design for laptop padded compartment for computerpadded compartment also applies to camera tablet computer e-reader tools gloves etc. Doubles as an Outdoor daypack heavy duty molle strip rucksack for ridingcamping or travel school bag. Product Specification: Screen Resolution: 4848 Left eye size: 710.59.56.5CM Right eye size: 6.510.89.57CM Connection method: Bluetooth /wifi Power: Power bankwithout Material:ABSPCCloth Backpack size: 361848CM Backpack net weight: about 1.7kg Single packaging volume: about 382349cm