Suitable for most hats, this complete combination provides easy illumination; This 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 port, compatible with any USB power source; Charge 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 the fabric according to the light's 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 work environments Simple to operate and clean: press the button on the LED light to adjust brightness levels; for cleaning, gently remove the headlight cap, take out the light unit, and wash the beanie as needed Suitable for many occasions: this rechargeable LED light is ideal for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, car maintenance, and more; A versatile, hands-free lighting solution for numerous activities Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Note: Light and display differences may cause slight color variation between the image and actual item. Measurement allowance is +/- 1-3 cm.