How to work? Install the light in DC5V car UBS port, it only light up automatically in dark enviornment or when the light sensor hole is fully hided.
Function 1：Set fixed color or 8 color in cyclic change. Click the light button lightly, set your favorite color from red/orange/yellow/green/cyan/blue/purple/white.
When you set color in white, to click button, 8 color will be in cyclic change;
Also you can restore setting by short click agian if you like fixed color ( color will be switched from red, then you can set your favorite color.)
Function 2: Adjust the brightness brighter or darker by long pressing and release on the button by your preference.
Function 3: Set the brightness in gradient breathing mode by double click on the button. Also you can restore setting by double click again if you like fixed birghtness mode.
About package: each order has one piece usb lights with user manual in one box.
About after sale: This is a very smart light with multiple setting functions. If you have any question please be free to tell us, we will answer questions for you immediately to figure out the problems.