Practical Functions: This product is ideal for use as a in-car light. When you turn it on, it will glow downward to illuminate your foot pit area and provide you with brightness. It also works as a decorative ambient light and comes in 8 different colors including red, orange, yellow, green, cyan, blue, purple and white. You can switch between them as needed. Application Scope: This mini USB LED light is suitable for all vehicles with USB-C ports, such as cars and SUVs. It is also universally fit for all kinds of power devices with USB-C ports, such as laptops, mobile power, sockets and so on. Please confirm your cars or devices interface type before you place your order. Changing Modes: You can fix it to monochrome mode to keep the color and brightness the same. You can also choose the 8-color breathing mode, whose color will change by itself according to the color sequence mentioned above. Breathing light mode has a clear trend of light and dark and color changes, which can make the interior of your car more homely. Usage Method: You can adjust the lighting effect you want by pressing the button. Pressing the button once will change the color in a single pass. Pressing the button twice allows you to switch between single color mode and breathing light mode. By long-pressing the button, you can dim or brighten the light level. Light Sensor: The light is very intelligent and can be turned on or off automatically according to the brightness of the environment by means of a photosensitive sensor. It turns on in the dark and off in the daytime. It saves you the trouble of manually switching the light and you will feel the convenience when using.