Suitable for most hats, this complete combination provides easy illumination. The LED lamp features 3 adjustable brightness settings: high, medium, and low, allowing you to select the most appropriate brightness level for use in the dark. USB charging: The flashlight is equipped with a standard USB charging port and can be charged via any standard USB source, such as 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 the new LED unit. For hats without built-in lights, you can cut a small opening according to the light’s shape. The set includes leather straps that can be sewn onto your hat for secure installation. This design is ideal for hands-free lighting in various work environments. Simple to operate and clean: Press the button on the center of the LED light to adjust the desired brightness level. To clean, gently press and remove the lamp cap, then detach the light unit before washing the beanie hat. Suitable for many occasions: This rechargeable LED flashing light is ideal for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecues, car maintenance, and more. The hands-free design makes it versatile for numerous activities. Color: Black Package Contents: 4 x Rechargeable LED lights Note: Light and display differences may cause slight color variations between the product image and the actual item. Measurement allows an error of +/- 1-3 cm.