Ultra High Visibility - Runs on a small button battery, and the LED lights and the polymer for light transmission ensure extremely high visibility during twilight and nighttime activities. The brightness is much higher than the glow of the dark luminous bars. This means more security for you, your children or your pet from careless and distracted drivers. Three lighting modes - The light strip has three lighting modes: Fast blinking, slow blinking, always bright mode. Just one click to control. Easy to use, suitable for all your favorite outdoor sports such as cycling, jogging, running, camping and walking. Freely adjustable size - the running reflectors, which are 28 to 32 cm in length, are adjustable and are suitable for most men, women and children. You can wear them on your wrist, ankle and arm. Quick to apply and very light, with good quality and comfortable material, the jogging light strips are the ideal addition to reflective items, perfect sports accessories. Replaceable Batteries - Powered by two pieces of CRV2032 lithium button cells, the wristband can work for about 60-80 hours. Normal use for 2-3 months, you can replace the battery yourself, we will give you 4 additional batteries 100% SATISFACTION QUALITY GUARANTEE - We guarantee a full refund within 60 days and a 12 month warranty. And we endeavor to answer all questions about products and services. We provide quick and satisfactory customer service so you can buy with confidence.