Features 1、4 DIGIT 7 SEGMENT: This is basic 4 digits 7 segments LED display module, showing each decimal point, the module is connected to digital IO through 2 pin. 2、ACCURATE WIRING: The digital display module adopts excellent PCB board, with accurate wiring and clear board path, has stable and reliable performance. 3、EASY TO CONNECT: The LED digital display module supports plug and play without the need for cumbersome wiring process, which is efficient and reliable. 4、EASY TO INSTALL: The LED display module has a compact structure, equipped with pin header, which is easy to connect and do not take up space. 5、WIDE APPLICATION: The digital tube module has stable performance and is easy to use, and can be used for electronic clock and other DIY electronic components. Specification Item Type: LED Display Module Material: PCB Board Application: LED digital display Number of Digits: 4 digits 7 segments Connection Module: 2 Pin Digital IO Use Library: TM1637.h Voltage: 5V Color: Red Package List 1 x Digital Tube 1 x Pin Header