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 has a standard USB port and can be charged using 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, cut a small opening according to the light's shape; Equipped with leather tabs, which can be sewn onto your hat to securely hold the light; This setup is ideal for hands-free lighting in various work environments Simple to operate and clean: press the button in the center of the LED light to adjust the desired brightness level; To clean, gently press and remove the lamp cap, then wash the beanie hat as needed Suitable for many occasions: this rechargeable LED light is ideal for walking, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more; Convenient and versatile for a wide range of activities Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Only the above package content, other products are not included Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowed within +/- 1-3 cm