1、4 DIGIT 7 SEGMENT: This is a basic 4 digits 7 segments LED display module, showing each decimal point, the module is connected to digital IO through 2 pin. 2、SIMPLE WIRING: The digital tube adopts excellent PCB board, with precise wiring and clear board path, which has stable and reliable performance. 3、EASU TO CONNECT: The LED segment display module supports plug and play without the need for cumbersome wiring process, efficient and durable. 4、GOOD PERFORMANCE: The LED display digital tube adopts TM1637 driver IC, which has stable performance and is convenient and fast to operate. 5、EASY TO INSTALL: The segment display module has a compact structure, equipped with pin header, which is easy to connect and do not take up space. Item Type: 4 Digit Digital Tube Material: PCB Board Application: LED digital display Display: 4 digits 7 segments Connection Module: 2 Pin connection to digital IO Use Library: TM1637.h Display Size: 0.36in Driver IC: TM1637 Color: Blue Voltage: 5V 1 x Digital Tube 1 x Pin Header