LOY LED Knight Cycling Backpack with Eye Motorcycle Helmet Bluetooth APP Control Waterproof Hard Shell Laptops LED BagSpecifications:Item name: LED BackpackColor: BlackBackpack material: Shell-ABS+PC, rear panel-1680PVC.Support points: 48*48 full-color dot matrix screenDot pitch: P2Power supply mode: Mobile powerRated voltage: 5V/2ACommunication method: BT connectionSupport mobile phones: iOS and AndroidSupport image animation size: 48*48 pixelsProgram support: Text/Picture/GIF/AnimationBackpack size: 36*18*48cm/14.17*7.08*18.89inNet weight of backpack: 1.7kg/3.74lbSingle package volume: 37*23*48cm/14.56*9.05*18.89inPacking weight/piece: 2.6kg/5.73lb (including products) BATTERY PACK FOR POWER INCLUDED