This backpack with reflective strips and LED signal lights is highly visible and safe at night. With a remote controller, this backpack can respond to the signal received, which can remind the passengers and drivers to keep distance. It is perfect for running, cycling, jogging and walking.Features:Lightweight backpack with reflective strips and LED signal lights for higher visibility and safety at night.Wirelessly control 4 signals (Left, Right, Forward, Stop), reminding passengers and drivers to keep distance.Recharges from your computer or any device with USB port, no more money wasted on batteries again.Tie the wireltransmitter on the handlebar of your bike for easier control.Adjustable shoulder and waist straps to fit your body perfectly.Specifications:Material: Nylon + polyesterColor: Green & Black / Grey & Dark Green (optional)Size: 21 * 21cm / 8.3 * 8.3inWeight: Approx. 200g / 7.0ozController:Signal Frequency: 2.4GHZControl Range: 3 metersBattery: 2 * CR2032Waterproof Grade: IPX-5Receiver Battery: 3.7V 850mAh lithium batteryPackage List:1 * Backpack1 * Remote Controller1 * Band4 * Zip Tie1 * User Manual