Feature: 1. ACCURATE CIRCUIT BOARDS: The 4-digit tube is made of a quality PCB board, featuring precise wiring and clear circuit traces. 2. EASY WIRING AND USE: The LED segment display module is plug and play, eliminating the need for complicated wiring processes, making it simple and fast to use. 3. 2-PIN CONNECTION: This is a basic 4-digit 7-segment display module. The display shows each decimal point, and the module connects to digital I/O via 2 pins. 4. TM1637 DRIVER CONTROLLER: The module connects via 2 pins to digital I/O and uses the TM1637 controller. It operates at 5V and provides a stable display. 5. STABLE AND DURABLE: The 4-digit digital tube has a stable structure, excellent performance, and a long service life. Specification: Item Type: 4-Digit Tube Material: PCB Board Application: LED Digital Display Digits: 4-Digit 7-Segment Controller: 74HC595 Connection Module: 2 pins connect to digital I/O Used Library: TM1637.h Voltage: 5V Color: Blue Package List: 1 x 4-Digit Tube 1 x Pin Header