This funny shoulder bag has a waterproof ABS shell and an LED screen. It is a programmable tech backpack that can display subtitles, animated GIFs, and images. Features: This creativity cool backpack is made of high-quality materials, durable and waterproof. It is a programmable tech backpack. You can DIY subtitles, animated GIFs and images and display them on the LED screen. Compact but with separated spaces to organize little items. Zipper pocket large enough to hold your phone, purse, keys, MP3, iPad mini, meet your daily needs. Suitable for commuting, travel, cycling, outdoor adventure, work, hiking, or even a surprise gift for friends. LED light design improves safety during night riding, making you more visible. Compatible with any power bank with output 5V 2A. How to use: Download theLOY EYESAPP. Use the built-in USB port (inside the backpack) to connect the power pack. After the BT device is successfully connected, open the LED space application. Specifications: Material: ABS, PC, Polyester Color: Black Screen dot: 48*48 Pixel pitch: P2 Size: 32*20*9cm / 12.6*7.9*3.5in Weight: 800g / 28.2oz Package size: 34*22*11cm / 13.4*8.7*4.3in Package weight: 927g / 32.7oz Packing List: 1 * Knight bag