This is a clock and decorative RGB Led Matrix
It’s controlled by a Colorduino Shield and NodeMCU v3 Board using i2C communication.
With Blynk app you can setup the alarm,change colors and other things.
Parts list is:
LoLin V3 NodeMcu Lua CH340G ESP8266 Board 6 Link
Colorduino V2.0 + 2088RGB-5 8x8 Matrix 10 Link
Touch Button 1 Link
Active Buzzer 1 Link
PLA Printer Plastic 2
Total price is about 20”

Link