Robodo 4 bits tube led display module four serial for arduino 595 driver Timer Counter and Clock Electronic Hobby Kit

"Item Description : 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: 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. Size:42X24X12mm. 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. Package including: 1PCS 4Bits Digital Tube LED Display TM1637 Module With Clock Display. "