A perfect beginner kit for any STEM student to practically operate This DIY clock kit uses special white digital tubes read and green 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 What39s 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 FeaturesPremium Quality Punctual Timing 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 Multiple Effects Five switching animation effects are available which can display the Time Temperature Date and Day of the Week four backlight LED effects are available and five kinds of Red LED Cube Moving effects are optional and time update animation effect User Defined Clock 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 You can select how often to switch the time temperature date and day of the week LED Backlight Four backlight LED effects are available 16 levels of brightness adjustment In addition the brightness can be adjusted automatically according to the ambient light Stylish Practical Transparent acrylic front and rear shell Enables countdown stopwatch alarm and 16 menu setting functions in total Your setting parameters will be stored if suddenly meet power down Note*Batteries are not included *Please install the coin cell battery model CR1220 before power on otherwise the clock may display errors *The soldering temperature should not be too high below 320C*We recommend that the soldering iron be grounded and that it is best to wear an electrostatic wrist strap grounding solder The welding speed should be as fast as possible SpecificationsColor WhiteMaterial Electronic MaterialPower Supply Cell battery CR1220 and USBpoweredbattery not includedItem Size 8 7*2 7*2 1cm 3 42*1 06*0 82inPackage Size 10*5*2cm 3 93*1 96*0 78inItem Weight 55g 1 94ozPackage Weight 58g 2 04ozPacking List1 * DIY Clock Kit