Suitable for most hats, this complete combination provides easy illumination. The LED lamp offers 3 adjustable brightness levels: strong, medium, and weak light modes, allowing you to select the most appropriate brightness for use in the dark. USB charging: The flashlight features a standard USB charging port, compatible with any standard USB power source. It can be charged using a car charger, computer, wall socket, 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 damaged headlight and replace it with this LED headlight. For hats without built-in lights, you can cut a small opening according to the light's shape. Equipped with leather tabs, you can sew the tabs onto your hat and securely attach the light. This combination 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. To clean, gently press and remove the headlight lamp cap, then wash the beanie hat as needed. Suitable for many occasions: This rechargeable LED flashing light is ideal for walking, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more. The hands-free design makes it versatile for a wide range of activities. Color: Black Package Contents: 4 x Rechargeable LED Lights Note: The package includes only the items listed above. Other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.