Suitable for most hats, this complete combination provides easy illumination. The LED lamp offers 3 adjustable brightness levels: high, medium, and low, allowing you to select the most appropriate setting 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 outlet, or portable power bank. The indicator light turns red during charging and green when fully charged, making it convenient and user-friendly. Easy to install and replace: If you have an LED knit beanie hat, simply remove the damaged headlight and replace it with the new LED unit. For hats without built-in lights, you can cut a small opening to fit the light according to its shape. Equipped with leather straps, you can sew the straps 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 on the center of the LED light to adjust the desired brightness level. To clean, gently press and remove the headlight cap, then detach the light unit before washing the beanie. The hat can then be cleaned as usual. Suitable for multiple occasions: This rechargeable LED flashing light is ideal for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, car maintenance, and more. The hands-free design makes it versatile for use in numerous scenarios. Color: Black Package Contents: 4 x Rechargeable LED lights Note: Only the items listed above are included. Other accessories shown are not part of the package. Please note that lighting conditions and monitor settings may cause slight variations in color between the product image and the actual item. Measurement tolerance is +/- 1-3 cm.