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