Features 4 DIGIT 7 SEGMENT: This is a simple 4-digit 7-segment LED display module that displays every decimal point, the module is connected to digital IO via 2 pins, 100% new, high quality, reliable and safe quality. ACCURATE WIRING The digital display module uses high-quality circuit board, the wiring is accurate, the board circuit is clear, and the performance is stable and reliable. I believe it can bring comfort to your life. Easy to connect: the digital LED display module supports plug and play, no tedious wiring process, high efficiency and reliability, stable performance and strong practicality. Easy installation: the LED display module has a compact structure, is equipped with pin headers, is easy to connect, does not take up space, is easy to install, does not take too long, is easy to use and easy to use. Wide application: the digital tube module has stable performance and is easy to use. It can be used for DIY electronic components such as electronic watches. It has a wide range of functions and obvious effects. Specification: Item type: LED display module. Material: PCB Application: LED digital display Number of digits: 4 digits 7 segments. Connection module: 2 pin digital IO Use the library: TM1637.h Voltage: 5V Colour: red. Package list: 1 x digital tube, 1 x pin header Package List 1 x Digital Tube 1 x Pin Header