LED dynamic backpack is designed to be waterproof and waterproof.

Walking expression pack, do funny soul, LED dynamic backpack, cool trend fashion.
LED dynamic backpack adds a LED screen inside, through the scan code link, you can freely edit and send various patterns, texts, animations, change expression packs anytime and anywhere, show youthful vitality, let personality stand out from the crowd And the mountains are Easy to attract attention.
Program support: text, pictures, animation

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