TM1637 0.56" Four Digit LED Clock Display Module
Now available from PMD Way are these convenient assembled LED clock-style displays, in five colors. They're 0.56" four digit, seven segment LED displays with a clock colon so you can use them to display time, data or anything else.
The best thing is that they're driven by a TM1637 LED display controller IC, so you only need two data lines from your Arduino or microcontroller, plus power and GND.
Inline headers as shown are included but not soldered to the board.