LED Wood-Grain Wooden Color-Changing Digital ClockProduct Function Introduction: RGB LED displays time and weekday. The RGB display color is changeable (with 4 RGB color gradient modes and 7 regular colors). It has a daylight saving time (DST) mode. The screen brightness can be adjusted in 5 levels: 100% 80% 50% 20% 5%. There are 8 function keys in total: "SET" (for switching between 12 24 hour system and time setting), "+" (for increasing value or scrolling up), " " (for decreasing value or