Lightweight & Comfortable: Made of high-quality skin-friendly nylon, it is comfortable and light, suitable for both adults and children; Waterproof switch button and dust plug design can also prevent sweat, rain, and dust. Easy to Wear: Our LED armband can be worn in any position, such as wrist, arm, ankle, pet, or bike; The adjustable elastic bands prevent it from falling during use, making it easy to use and operate. 3 Light Modes: Fast flash, slow flash, constant on; LED high visibility + 360°reflective features make our running lights suitable for people who engage in outdoor activities such as walking, running, and biking in low-light conditions. Long Battery Life: Our LED safety bracelet takes only about 1.5 hours to fully charge and can last for about 8-10 hours. USB-C Rechargeable & 360°Reflective: With USB-C rechargeable design, you can avoid the hassle of frequent battery replacement and battery cost. Elasticized Nylon.