TM1637 4 Digit 7 Segment  Digital Tube LED Display Module Clock Display 
	- Uses 4-digi 3.6” 7-segment display, common anode, 12 pins
 
	- Only need two control pins, CLK and DATA (DIO)
 
	- Uses common 7-segment control IC TM1637, widely used with 7-segment in many cases, for example, small instruments, domestic appliance, etc.
 
	- Possible to adjust brightness, 8 level gray scale
 
	- Control signal can be 5V or 3V3
 
	- 4 * M2 installation holes
 
	- Arduino library (for TM1637) supported.