Feature:1. Waterproof material, using waterrepellent film to protect your LED screen can work even in rain.2. Powered by mobile power supply, customize backpack LED screen content through APP.3. Sshaped adjustable shoulder strap, shoulder strap designed and padded shoulder strap can effectively share weight and travel easily.4. Ergonomic backpack and back wrapping designed can effectively relieve shoulder pressure and travel easily.5. Multiangle expansion, userfriendly access, multifunctional storage bag designed, so that storage is clear at a glance.6. Buzz heat dissipation designed, multiple storage space, thick and comfortable handheld, highquality metal zipper.Spec:Item Type: LED BackpackOptional Color: Black,Pink,LakeBlueSupport Points: 64 x 64 fullcolor dot matrix screenScreen Size: Approx. 25 x 25cm / 9.8 x 9.8inPower Input: 5V/2APower Supply Mode: Mobile power supplyCommunication Method: WIFI, GPRS, GPS, 4GSupport File Format: Text, picture, GIF animationBackpack Capacity: 20LPackage List:1 x User Manual1 x LED Backpack