Suitable for most hats, this complete combination provides easy illumination. The LED lamp offers 3 adjustable brightness levels: strong, medium, and weak light modes, allowing you to select the most appropriate brightness for use in the dark. USB charging: The flashlight features a standard USB charging 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 a small opening to fit the light. Equipped with leather tabs, which can be sewn onto your hat for secure installation. This combination 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. For cleaning, gently press and remove the headlight cap, then detach the light unit to wash the beanie hat as usual. Suitable for many occasions: This rechargeable LED flashing light is ideal for walking, camping, hunting, shoveling snow, fishing, cycling, running, hiking, barbecuing, car maintenance, and more. The hands-free design makes it versatile for a wide range of activities. Color: Black Package Contents: 4 x Rechargeable LED Lights Note: The product included in the package is only as listed above. Other items are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows for an error of 1-3 cm.