Features ACCURATE WIRING PCB: 4 Digit tube is made of excellent quality PCB boards, possess accurate wiring and clear board path STABLE AND DURABLE: 4 Digit digital tube come with stable structure, excellent performance and long service life FAST WIRING TO USE: LED segment display module is plug and play, no need for cumbersome wiring process, easy and fast to use 2 PIN CONNECTION: This is a 4 digit 7 segment display module, the display screen show each decimal point, the module is connected to digital I O via 2 pins TM1637 DRIVER CONTROLLER: Connection module adopt TM1637 controller, the voltage is 5V, possess stable display, very reliable Specification: Item Type: 4 Digit Tube Material: PCB board Application: LED digital display Digits: 4 Digit 7 segment Driver IC: TM1637 Voltage: 5V Package List: 4 x Digit Tube 4x Pin Header Note: Match the appropriate model size before use. Package List 4 x Digit Tube 4x Pin Header