The module is a 12-foot 4-digit anode tube w/ clock; Driver IC is TM1637; Only two signal lines can make SCM control 4-digit 8-segment LED; A product for Arduino that works with official Arduino boards.
1. Display of male red for the four digital tube
2. Tube is 8 gray adjustable
3. Level control interface for 5V or 3.3V
4. M2 screws positioning holes for easy installation