Keep away from potential hazards - this belt has a LED is powered by a small button battery, which provides excellent visibility. ultra-high for twilight and nighttime activities. In outdoor activities (such as running, jogging, cycling, and hiking), ensure your safety. at night.^ Upgraded rechargeable design - In addition to ensuring the normal operation of the LED bracelet, the running reflector also has an improved design and a rechargeable battery. Charge for 2 hours and work for 3. 5 hours. Practical, easy to use. use and save money.^ 25 grams. Lightweight and easy to carry. transport. The bracelet is lightweight and can be worn to any age. Velcro design, easy to attach. use. Even if you wear it for a long time, this bracelet will not irritate you. It is comfortable to wear. wear it and you'll notice it. ^ Adjustable - The size of the punching strap can be adjusted from 11" to 11". 33cm. Just push her. It can be worn by adults and children. It can be worn on the wrist, on the shoulder. ankle or arm. If you want to wear it on your biceps, please check the size to make sure it fits.^ Parameters-Color: Blue, Weight: Approx. 25g; Packing: 2 packs; Charging time: about 1-2 hours; Operating time: 2-5 hours; Size: 27.9-33cm.