Display common anode for the four red LED.
Digital tube 8 gray adjustable.
Level control interface for 5V or 3.3V.
4 M2 screws positioning holes for easy installation.
Interface 4 digital display module: (the last picture show).
Control Interface : A total of four pins (GND, VCC, DIO, CLK), GND to ground , VCC is the power supply , DIO of data input and output pin , CLK is the clock signal pin ;
Digital tube: 4 common anode score points with 0.36 inches LED, red highlights ;
Positioning holes : 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install , to achieve inter- module combination.