HIGH VISIBILITY IN DARK -- Our LED wristbands are bright when turned on, enhancing visibility in low-light conditions. The 360-degree high-visibility design helps make you more noticeable and safer when walking, jogging, or cycling at dusk or night. RECHARGEABLE -- These light-up armbands feature a built-in rechargeable battery, eliminating the need for frequent battery replacements. A 1-hour charge provides over 6 hours of continuous use, making them user-friendly, practical, and economical. UNIVERSAL FIT -- The armbands measure 35.5 cm x 3.7 cm, offering a comfortable fit for most users. Suitable for runners, cyclists, and walkers. Easy to use and can be worn on the wrist, arm, or ankle. LIGHTWEIGHT & COMFORTABLE -- Lightweight design with a soft, smooth fabric interior that is comfortable against the skin. Stays securely in place during activity without sliding or bouncing. 3 DIFFERENT MODES -- Features three LED light modes: fast flash, slow flash, and steady bright. Adjust the mode based on your environment for increased safety. Waterproof design allows reliable use in rainy conditions.