Suitable for most hats, this complete combination provides easy illumination. The LED lamp offers 3 adjustable brightness levels: high, medium, and low, allowing you to select the most appropriate setting for use in the dark. USB charging: the flashlight features a standard USB 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 convenient and easy 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 the hat fabric according to the light's shape. Equipped with leather tabs, you can sew the tabs onto your hat and securely attach the light. This combination is ideal for various work environments where hands-free lighting is needed. 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 wash the beanie hat as needed. Suitable for many occasions: this rechargeable LED flashing light is ideal 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 Material: plastic Package Contents: 4 x Rechargeable LED Lights Note: The above package includes only the listed items; other products are not included. Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.