Catalog > Internet of Things (IOT) Related Products > More Platforms 4 Digit Common Anode Red LED Display 4 Digit Common Anode Red LED Display HKD 4 DIG LED DISPLAY I2C-4WIRE TM1637 - 4 Digit Common Anode Red LED Display. I2C-4 Pin (GND, VCC, DIO, CLK). 5V OR 3.3V 29.74 ZAR inc for 1 Each 7 in Stock Add Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE 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 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