LED High Visibility Flashing Safety Armband Cycling Jogging Walking Reflective LED Armband (Blue) This item suitable for for outdoor sports, night running, large-scale festival party, concert, promotion, cheer, employee benefits, corporate events and so on. Brand new product at high quality With 3 models of illumination--Steady On, fast flash and normal flash With various colors available. Red,orange,yellow,blue,green (five kinds color for you chose) Extendable Size: 18-20cm