Suitable for most hats, this complete combination provides easy illumination. This LED lamp features 3 adjustable brightness settings: high, medium, and low, allowing you to select the most appropriate brightness level for use in the dark.USB charging: The flashlight has a standard USB port and can be charged using any standard USB power source. You can charge it via car charger, computer, wall outlet, or portable power bank. The indicator light turns red during charging and green when fully charged, making it simple and convenient to use.Easy to install and replace: If you have an LED knit beanie hat, simply remove the broken headlight and replace it with this LED headlight. For hats without built-in lights, you can cut a small opening according to the lights shape. Equipped with leather tabs, you can sew the tabs onto your hat and securely attach the light. This setup is ideal for hands-free lighting in various work environments.Simple to operate and clean: Press the button in the center of the LED light to adjust the desired brightness level. For cleaning, gently press and remove the headlight cap, then wash the beanie hat as needed.Suitable for many occasions: This rechargeable LED light is ideal for walking, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more. It is versatile and convenient for a wide range of activities where hands-free lighting is essential.Material: Plastic Color: Black Package Contents: 4 x Rechargeable LED lights Note: Light and display differences may cause slight variations between the color shown in the image and the actual product. Measurement may vary by +/- 1-3 cm.