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 select the most appropriate level for use in the dark USB charging: the flashlight has a standard USB port and can be charged via any compatible 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 unit; For hats without built-in lights, cut the fabric according to the light's shape; Includes leather tabs that can be sewn onto your hat for secure installation; This setup is ideal for hands-free lighting in various applications Simple to operate and clean: press the button on the center of the LED light to adjust brightness levels; Before washing, gently remove the light module from the cap, then clean the beanie as usual Suitable for multiple occasions: this rechargeable LED light is ideal for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, and vehicle maintenance; Versatile design allows for use in many scenarios where hands-free lighting is needed Material: plastic Color: black Package Contents: 4 x rechargeable LED lights Only the above items are included; other accessories are not included Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement tolerance is +/- 1-3 cm