Suitable for most hats, this complete combination provides easy illumination; This LED lamp features 3 adjustable brightness settings: high, medium, and low modes, allowing you to select the most appropriate brightness level for use in the dark USB charging: the flashlight is equipped with a standard USB 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 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, cut a small opening matching the light's shape; Includes leather straps that can be sewn onto your hat for secure installation; This setup provides hands-free lighting ideal for various tasks Simple to operate and clean: press the button in the center of the LED light to cycle through brightness levels; To clean, gently remove the lamp cap, take out the light unit, and wash the beanie as needed Suitable for multiple ocns: this rechargeable LED light is ideal for walking, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more; Its versatile design allows for hands-free lighting across a wide range of activities Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Only the above items are included; other accessories are not part of the package Note: Lighting and display differences may cause slight variations between the color shown in the image and the actual product; Measurement tolerance is +/- 1-3 cm