This LED bike pack is equipped with reflective strips and LED lights, which will respond to signal received from remote controller, reminding passengers and drivers keep distance from you. Features: Made of high quality nylon fabric, waterproof and wear resistant. Wireless control, safely use when riding. Great for running, cycling, walking. Highlighting, intelligent signal by wireless controller, easy-operating and security. Having 5 Led signals: Left, Right, Forward, Stop and Standby, providing a safer warning effect while cycling. With built-in USB rechargeable battery, can be charged simply from your computer or any device with USB port. With 15L backpack, large capacity for your necessities and tools. Specifications: Material: Nylon Color: Yellow/Gray (Optional) Size: 40 * 25 * 15cm / 15.7 * 9.8 * 5.9in Weight: 300g / 10.6oz Capacity: 15 liter LED Light Color: Green+red color LEDs Battery: Built-in 200mA rechargeable lithium battery Charge: Mini USB recharged (with USB cable) Controlling Distance: Within 3 meters Direction Indicator: 30LEDs, 8.5*7cm direction indicator Package List: 1*Backpack 1*Wireless Controller 1*Buckle 4*Nylon Belt 1*User Manual