The module is a 12 foot with a clock point four common anode tube (0.36 in.) display module for driver IC TM1637, only two signal lines can make the MCU control 4 8 digital tube.
Module features are as follows:
1. Display common anode for the four red LED
2. Digital tube 8 gray adjustable
3. Level control interface for 5V or 3.3V
0.36 Inch TM1637 LED Display Module