HIGH VISIBILITY IN THE DARK--Our LED armbands are very bright when you turn them on, which improves visibility especially in dark situations. The 360-degree ultra-high visibility design is designed to make you more visible and safer when walking, jogging or cycling at dusk and at night. RECHARGEABLE--Our lighted armbands come with rechargeable battery, so you only need to charge regularly instead of changing batteries frequently. 1 hour charging can guarantee over 6 hours of long-lasting working time, user-friendly, more practical and economical. UNIVERSAL FIT--The size of this reflective running gear is 35.5cm x 3.7cm, so it is perfect for everyone such as runners, cyclists and hikers. Very easy to use, you can easily attach the running safety lights to your wrist, arm and ankle. LIGHTWEIGHT & COMFORTABLE--It is very lightweight. The inside of the running light bracelet is made of a very comfortable and smooth fabric, so direct contact with the skin will not give you any uncomfortable feelings. It can be held firmly in place and will not move up and down when running or walking 3 DIFFERENT MODES--The LED running lights are designed with three light modes, fast flashing, slow flashing and steady light, you can adjust different modes according to different environments to make you safer. The waterproof design allows you to use it with confidence even in the rain.