Feature 1、LED color screen backpack, special shape design, eye-catching. Large capacity design, convenient to store jackets, umbrellas, water bottles, laptop, snacks, etc. 2、Connected to the phone APP(LOY EYES) via BT, the material library is rich in pictures and animation materials, you can choose your favorite effect, support DIY, compatible with Android and iOS systems. 3、Backpack with a soft back, which is comfortable and ergonomic, and the shoulder strap is adjustable. The housing is made of sturdy ABS, which effectively protects the internal items from impact or damage. Features: LED color screen backpack, special shape design, eye-catching. Large capacity design, convenient to store jackets, umbrellas, water bottles, laptop, snacks, etc. Connected to the phone APP(LOY EYES) via BT, the material library is rich in pictures and animation materials, you can choose your favorite effect, support DIY, compatible with Android and iOS systems. Backpack with a soft back, which is comfortable and ergonomic, and the shoulder straps are adjustable. The housing is made of sturdy ABS, which effectively protects the internal items from impact or damage. It requires an external power supplys(not included) to power the backpack's LED screen, just connect the power to the internal USB cable and use. Reliable quality, lightweight and stylish, perfect for outdoor camping, travel, Cycle, riding, hiking, etc. Specifications: Color: Black Material: ABS + PC + 1680PVC Rated Voltage: 5V/2A Screen: 48 * 48 Full-Color Dot Matrix Screen Support Picture Animation Size: 48 * 48 Pixels Support: Text/Picture/GIF/Animation Connection Method: BT APP Language: Simplified Chinese, Traditional Chinese, English, German, Korean, French, Japanese, Portuguese, Russian, Spanish, Italian, Latin, Thai Left Eye Size: 70 * 105 * 95 * 65mm Right Eye Size: 65 * 108 * 95 * 70mm Bag Size: 360 * 180 * 480mm/ 14.2 * 7.1 * 18.9in Bag Weight: 1.7kg/ 3.7lb Package Size: 370 * 240 * 530mm/ 14.6 * 9.4 * 20.9in Package Weight: 2.7kg/ 6.0lb Note: APP can be downloaded directly by scanning the QR code on the manual or by searching "LOY EYES" in the APP store. Packing List: 1 * Backpack 1 * User's Manual Package List 1 * Backpack 1 * User's Manual