Fits most hats, a complete combination for easy illumination in the dark; This LED light has 3 adjustable brightness levels, namely strong, medium, and weak light mode; you can choose the most suitable brightness to see in the dark. USB charging: the flashlights have standard USB, which can be charged via any standard USB port; you can use car chargers, computers, sockets, and power banks to charge; The indicator turns red when charging and green when fully charged, simple and convenient to use. Easy to install and replace: if you have an LED knitted hat, just remove the broken headlamp and replace it with an LED headlamp; If your hats do not have LED lights, you can cut the hats according to the shape of the light; Equipped with leather fasteners, you can sew leather fasteners onto your hat and install the lights; This combination is suitable for all places where you need lighting while keeping your hands free. Easy to apply and clean: press the button in the middle of the LED light to adjust the brightness you need; for cleaning, gently press the headlamp cover to remove the light from it, and then you can wash the hat easily. Suitable for many occasions: this LED rechargeable flashing light is suitable for various occasions, such as walking, camping, hunting, snow shoveling, fishing, cycling, running, hiking, barbecuing, car maintenance, etc.; Easy to match, the hands-free flashlight can be used in a variety of occasions. Material: plastic Color: black Package contents: 4 * rechargeable LED lights Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.