Suitable for most hats, this complete combination provides easy illumination. The LED lamp offers 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 features a standard USB charging port, compatible with any standard USB power source. You can charge it 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 convenient and user-friendly. 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 unit. Equipped with leather tabs, you can sew the tabs onto your hat and securely attach the light. This setup is ideal for hands-free lighting in various work environments. Simple to operate and clean: Press the button in the middle of the LED light to adjust the desired brightness level. To clean, gently press and remove the headlight cap, then detach the light unit before washing the beanie hat as usual. Suitable for many occasions: This rechargeable LED flashing light is perfect for walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, car maintenance, and more. Its hands-free design makes it versatile for a wide range of activities. Color: Black Package Contents: 4 x Rechargeable LED Lights Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement allows an error of +/- 1-3 cm.