describe: feature: 1.ADJUSTABLE TO FIT ANY SIZE: The elastic band is easy to adjust for a loose or snug fit. 2.Super bright,comfortable,soft,easy to use,user friendly. 3.Our arm light design is suitable for both men and women,comfortable to wear on legs or ankles,arms. 4.Just 1 click to switch the light between steady mode and flashing mode 5.Great for Running,Walking,Walking,Cycling,Hiking,Camping,Party,Rave,Holidays,Festivals and Concerts,Skate Accessories 6.This product uses batteries,please unplug the insulating sheet when using it Notice: 1.Due to different monitors and light effects,the actual color may be slightly different from the picture.Please allow 1-3cm deviation due to manual measurement. Specification: Product name: LED luminous armband Applicable scenarios: outdoor sports,cycling,running,etc. Package includes: 1 x LED armband