3 Light Modes: This light up armband has 3 lighting modes - white mode, red mode and white and red blinking mode - for personalized visibility and personal preference. Highly Reflective: The light up armband creates a strong reflective effect when exposed to light. Whether you are illuminated by car headlights, streetlights or other light sources, it can make you eye-catching in the dark. When running, it allows drivers to spot you from a distance, which greatly improves the safety of traveling at night. Adjustable Size: The length of the armband can be freely adjusted, so that it can be easily both slim arms and more robust arms. You can also adjust it to the most comfortable position according to your preference. Rechargeable Armband: The running light has a built-in high-capacity battery with excellent battery life. One full charge can meet your lighting needs for many night runs, long rides and other activities. You don't have to worry about running out of power even if you use it continuously for hours outdoors. Wide Application: The running light can be used in a variety of scenarios, such as running at night, walking, cycling, hiking and so on. It can illuminate and warn you and accompany you to run safely. Color:Gray Material:Silicone Package Contents: 2 * Armband Light 1 * USB Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.