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·Connection method: BluetoothDownload APP connection3D hard shell designFreely edit DIY, pictures, animated pictures, textLED travel safetyTravel safety at night (LED display)Product Features:Backpack with Display,Technological sense, trendHighlights:Smart APP ControlProduct Category:Pixel Bag,Smart Backpack,Pixel Bag,led backpack-------------------------------------------------------------------------------------------------------------------------------------------1: Products do not contain power, they need to have their own mobile power supply or other power supply mode2: Any scene is played at any time, personality shows cool, pleasing to the surprise effect.-------------------------------------------------------------------------------------------------------------------------------------------【Product name】LOY Angel eye backpack【Material】 Front shell ABS+PC rear 600D【Size】275mm160mm265mm【Weight】 603g【Power supply】