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 is equipped with a standard USB port and can be charged via any standard USB source; 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 headlight and replace it with this LED headlight; For hats without built-in lights, you can cut the hat fabric to fit the light shape; Includes leather straps that can be sewn onto your hat for secure light attachment; 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 press and remove the headlight cap to detach the light unit, allowing the beanie to be cleaned easily Suitable for multiple occasions: this rechargeable LED light is ideal for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, car maintenance, and more; Versatile and convenient for hands-free lighting needs Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm