High visibility and reflective - The LED wristbands are clearly visible in the dark and the material reflects light. Thus, the LED wristband can prevent potential dangers during morning walks, night walks or dog walking. Two light modes - The light bands have three light modes: fast flashing, steady glow, you can choose any of them as your preferred mode for outdoor activities. Waterproof with non-slip stretch band - The running reflectors, which have a length of 20 to 40 cm, are adjustable and fit most men, women and children. You can wear them on your wrist, ankle and arm. Waterproof with non-slip stretch band - The running reflectors, which have a length of 20 to 40 cm, are adjustable and fit most men, women and children. You can wear them on your wrist, ankle and arm. Replaceable batteries - Powered by two pieces of CRV2032 lithium button cells, the wristband can work for about 60-80 hours. The batteries can be replaced when the power is low. Where to use the LED bracelet? This LED bracelet is a must-have for outdoor activities. You can wear it on your upper arm, wrist or ankle when jogging or walking the dog. You can also pair it with your backpack or bike when hiking or cycling. With highly reflective material and highly visible light, the LED bracelet can prevent potential dangers and ensure people's safety. What are the advantages of our LED bracelet? Strong lighting. With the reflective material, our LED bracelet is much brighter than similar products, ensuring outdoor safety. Better quality. There is exquisite sewing with good nylon material and environmentally friendly transparent PVC material, so the LED bracelet is comfortable. The battery is easy to change. Behind the power switch is the battery compartment, it is very open, you can use a coin or screwdriver to open and change the batteries. It is very convenient. How to use the LED bracelet? Press once for permanent lighting Press twice for flashing Press a third time to turn off the warranty Note: Do not force open the black battery case. If you want to change the batteries, be sure to follow the replacement instructions in the pictures.