HIGH VISIBILITY DAY AND NIGHT - This light-up LED bracelet combines LED light strips with waterproof reflective material, perfect for signaling on the road during the day and more visible at dusk, night or in the rain RECHARGEABLE VERSION - No more worries about changing disposable batteries, this flash bracelet has a micro USB port for charging anywhere, and a mini USB cable is also provided How does it work? Just press the button, the LED bracelet will emit bright light, 3 visual effect mode changes (continuous, flashing and flashing) let you experience the extraordinary feeling Adjustable size - length from 27 to 31 cm, using the adjustment buckle and Velcro closure, perfect fit for wrist, bicep, calf and even hair bun, it can be worn by anyone, whether it is a child or an adult SUITABLE FOR ALL YOUR ACTIVITIES - Besides cycling or running (like jogging or dog walking), this LED bracelet will find its place in all possible and imaginable themes: discos, bars, party rooms, concerts , PARTY AND FESTIVAL Unlike other lightweight wristbands, our wristband is rechargeable via the Micro USB port, easy and convenient to charge anytime, anywhere, no more worry about replacing disposable batteries or worrying about running out of batteries! A mini USB cable is also provided. Reflective waterproof features reflective strips to keep you seen on the road in broad daylight or when the battery is dead. Waterproof design allows you to wear it in rainy days, ensuring your safety when cycling or walking at night Velcro adjustable Use the adjustment buckle and Velcro closure, the length can be adjusted from 28 to 32 cm, perfect fit for wrist, bicep, calf or even hair bun, it can be worn by anyone, whether it is a child or an adult