Feature: Square LED dot matrix module display time, temperature, date, week and other information; 5 different font styles to choose from; 5 kinds of colons show special effects; 10 different animation switching effects to choose from; 6 kinds of time digital change effects can be selected; Touches key operation menu; RTC with DS3231, built-in warm-up crystal oscillator, ultra-high precision; Can be put into CR1220 backup battery to prevent power-down time data lossCR1220 backup battery not include in the kit; Birthday reminders can be set and the date will display Happy birthday; 5 levels of brightness adjustment function, built-in photoresistor, can automatically adjust the brightness according to ambient light, can also specify the brightness; 4 kinds of time display modes, two hour, minute and second display modes Hour: Minute: Second and two time-division display modes Hour: Minute; 5 levels of information switching time, according to preferences set how often to display temperature, date, week and other information; Voice-activated wake-up function, beating the desktop or clapping hands to wake up the display; 4 kinds of backlight effects are optional, you can also choose to turn off; Countdown function, countdown buzzer sounds reminder after the end; One timed alarm clock that automatically shuts off after two minutes or closes by touching the button; Holiday reminder function can display 16 holiday reminders for Easter, Valentine's Day, Mother's Day, Thanksgiving, etc. see the holiday reminder list for details; Acrylic closed shell; Color optional: red, green, blue, white; USB DC 5V voltage supply; Overall size: 168mm x 42mm x 15mm; Holiday reminder list: New Year: January 1 Show New Year's Day Valentine's Day: February 14 Shows Valentine's Day Women's Day: March 8 Women's Day April Fools' Day: April 1 Show April Fools' Day Easter: First Sunday after the equinox Show Easter Sunday Labor Day: May 1 Shows Labor Day Mother's Day: Mothers' Day Children's Day: June 1 Show Children's Day Father's Day: Third Sunday in June Showing Fathers' Day Halloween: October 31 Halloween Halloween: November 1st All Saints' Day Singles: November 11 Show Single's Day Thanksgiving: Fourth Thursday of November Show Thanksgiving Day Christmas Eve: December 24 Show Christmas Eve Christmas: December 25 Show Merry Christmas End of the year: December 31 Show Last day of the year Package List: 1 x DIY Clock Kit