DIRECTION INDICATOR: When youre making a turn, simply tap the corresponding button on the included wireless handlebar remote.The LED light will remind pedestrian and drivers keep distance from you. SAFETY ASSURANCE:Lightweight backpack with reflective strips and LED signal lights for higher visibility and safety at night,The LED light will remind pedestrian and drivers keep distance from you. Fastening: Zipper, Button EASILY ASSEMBLED:Put the jacket directly on back of you or over your backpack, the adjustment is done through its 2 adjustable straps in length and the two straps at the waist. USB RECHARGEABLE:Includes built-in High Capacity battery,save your battery money and replace battery time.This reflective vest is equipped with reflective strips ,a best have road safety accessory in cycling. 12-MONTH WARRANTY: We offer a free 1-year warranty. Contact us through your Amazon order if you have any problems. Our dedicated team will respond within 24 hours to help solve problems.