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 choose the most appropriate brightness level for use in the dark USB charging: the flashlight has a standard USB interface, which can be charged via any standard USB port; Compatible with car chargers, computers, wall outlets, and portable power banks; 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 light and replace it with this LED light; For hats without built-in lights, you can cut a small opening according to the light's shape; Comes with leather tabs that can be sewn onto your hat for secure installation; This setup is ideal for hands-free lighting in various applications Simple to operate and clean: press the button in the center of the LED light to adjust the desired brightness level; Before washing, gently remove the light unit from the cap, then clean the beanie as usual Suitable for multiple occasions: this rechargeable LED light is ideal for walking dogs, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more; Designed for hands-free convenience in a wide range of activities Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Note: Light and display differences may cause slight variations between the color shown and the actual item. Measurement may vary by +/- 1-3 cm.