Asdomo LED Armband Running Safety Cycling Jogging Reflective Belt Wrist/Ankle Runners lights are great for jogging, dog walking, running safety and personal safety Transportation light up armbands emergency roadway lights? The length is 10 - 13 inches battery included to last an average of 100 hours 3 led light modes:1. Fast blinking 2, slow blink 3 steady bank Package include: 4 pcs led arm bands(red, orange, blue, yellow)