LED Illuminated Backpack Waterproof Casual Sports Student Bag Color:Black but energy saving and environmental

but energy saving and environmental protection

automatic pairing and interconnection

strong magnetic adhesion

usb interface

5mm analog auxiliary audio and available for connection to an external device such as an amplifier via standard RCA-style connectors

LED Illuminated Backpack Waterproof Casual Sports Student Bag Color:Black but energy saving and environmental1. Backpack material: oxford, nylon, leather 2. Screen pixel count: 64x64 3. Screen size: 25x25cm 4. Screen pixel pitch: P3. 75 5. Power supply: power bank powered 6. Communication method: bluetooth 7. Built in material library: fun emoticons, trending topics, click to use 8. Power bank powered (not included): flexible, convenient, safe, and stable 9. Ergonomically widened shoulder straps: comfortable and slip free, effectively reduces shoulder