Product name: running lights for runners Product size about:36*2.5cm/14.17*0.98in Product color: As shown in the figure Product material: ABS+Polyester Product features: 1. USB rechargeable: This LED glow armband is equipped with a built-in USB rechargeable battery, eliminating the need for disposable batteries. Simply plug it into any USB port to recharge and enjoy hours of continuous use. 2. Versatile and multi-purpose: This armband is perfect for various outdoor activities such as cycling, camping, hiking, and running. It can also be used as a LED wristband for concerts, parties, and cheerleading events, adding a vibrant and eye-catching things to your outfit. 3. Adjustable and comfortable fit: The armband features an adjustable strap that allows for a secure and comfortable fit on any arm size. It is lightweight and flexible, ensuring maximum comfort during your activities without restricting movement. 4. Bright and visible: The LED lights on the armband emit a bright and highly visible light, making you easily noticeable in low-light or dark environments. This enhances your safety and visibility, reducing the risk of accidents during night runs or outdoor activities. 5. Weather-resistant: Constructed with high-quality materials, this LED armband is designed to withstand various weather conditions. It is water-resistant, ensuring its functionality even in rainy conditions. The construction also ensures long-lasting use, making it a reliable accessory for all your outdoor adventures. Precautions: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2. If you feel difficult to choose the size, you can feel free to contact me we will give you some suggestion, but it is for you reference only. Package includes: 1pc running lights for runners