Description:  This DIY clock kit uses red and green color special white digital tubes. The Red LED Square can be used as the Seconds Move. The Green Digital part displays Time, Temperature, Date and Day of the Week. At the same time, there are three optional colors of Yellow, Blue or White for backlight effect and blinking hints on the inside and back, and multiple backlight effects are built in.What's more, the digital tube has a variety of switching animation effects to choose from, as well as more than a dozen functions such as Alarm Clock, Automatic Brightness Adjustment, Time Signal, Hour Change animation, Countdown and Stopwatch, so that simple clock DIY is no longer boring.  Features:  Display time with special color mixing LED digital tube;  Using DS1307 clock chip with high precision crystal oscillator to provide accurate time, can be put into CR1220 backup battery to prevent loss of time data when power off;  Five switching animation effects are available, which can display the Time, Temperature, Date and Day of the Week.  The time can be set to 12 or 24 hours, the temperature can be set to Fahrenheit or Celsius, and the date can be displayed in different formats.  Can be set to alternately display the Time with "Hour:Minute" and "Second".  One Alarm Clock,with backlight LED and Beep remind, press any button to stop the alarm clock.  4 backlight LED effects are available.  Backlight color: White, Orange, Blue.  16 levels of brightness adjustment. In addition, the brightness can be adjusted automatically according to the ambient light. You can select how often to switch the time, temperature, date and day of the week.  Five kinds of Red LED Cube Moving effects are optional.  Time update animation effect.  You can turn on the "wake-up" function, and press any button to display all the information, and then automatically turn off the display.  Three mid-point "colon" walking effects are optional.  Countdown function: After setting the minutes and seconds, there will be LED flashing and buzzer beep when the time reaches. Stopwatch function with time accuracy of 0.01 seconds.  Transparent acrylic front and rear shell.  A total of 16 menu setting functions, power-down memory menu setting parameters;  USB DC 5V voltage power supply;  Overall dimensions: 87mm x 27mm x 21mm;     Function:  1. Press and hold the setting button (Left) for about 1.5 seconds to enter or exit the menu;  2. Short press the switch key (Right) to switch between: (Set Time)-(Set Date)-(Set Alarm)-(Set LED Mode)-(Set Brightness)- (Set Information Switching Duration)-(Set Format)-(Set Led Cube Move)-(Set Time Signal)-(Set Time Digital Transition Effect)-(Set Information Display Switching Animation Animation)-(Set Countdown)-(Enable Key Wakeup)-(Set Mid-point "Colon" Effect)-(Turn on the seconds display)- (Stopwatch Function).     Parameter Settings:  1. Time (Set Time): change the flashing parameter value by the switch key (Right), and confirm the change by setting key (Left);  2. Date (Set Date): The modification sequence is: year-month-day;  3. Set Alarm: ON- Turn on the alarm and enter the alarm time setting; OFF- Turn off the alarm.  4. LED effect (Set LED-Mode): 0-turn off the backlight; 1-always on; 2-key light; 3-breathing mode; 4-candle light mode;  5.