4 light change modes: This outdoor night running light delivers up to 150 lumens and features 5 lighting modes: high, medium (50%), low (30%), and red flashing. Easily switch between modes with a simple press of a button to suit different conditions. USB rechargeable: The running light is equipped with a built-in rechargeable battery. Remove the cover to reveal a USB plug that fits most USB ports. A red indicator light shows charging status, and turns green when fully charged. Please ensure correct insertion direction when connecting. Safety design: The reflective running light enhances visibility during nighttime jogging by illuminating you and your surroundings, helping others see you from a distance and reducing the risk of accidents. Reliable and durable: Made from high-quality ABS plastic, this compact running light measures approximately 7 x 4 x 2 cm (2.7 x 1.6 x 0.8 inches), is lightweight, and operates for about 34 hours on a full charge. Suitable for various weather conditions and seasons. Wide application: The running light can be clipped to hats, belts, collars, pockets, backpacks, or dog collars, allowing hands-free use and reducing strain during running, jogging, climbing, camping, and other outdoor activities. Practical, affordable, and convenient. Color: Black Material: Plastic Package Contents: 1 x Light Note: The package includes only the items listed above. Lighting and display differences may cause slight variations between the image and actual product color. Measurement tolerance is +/- 13 cm.