Features:Display common anode for the four red LEDDigital tube 8 gray adjustableLevel control interface for 5V or 3.3V4 M2 screws positioning holes for easy installationSize: 42X24X12mmInterface 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 pinDigital 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 Includes:1 x 4 Bits TM1637 Digital Tube LED Clock Display Module For Arduino Due UNO 2560 R3
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