1ACCURATE WIRING PCB: 4 Digit tube is made of excellent quality PCB boards, possess accurate wiring and clear board path 2STABLE AND DURABLE: 4 Digit digital tube come with stable structure, excellent performance and long service life 3FAST WIRING TO USE: LED segment display module is plug and play, no need for cumbersome wiring process, easy and fast to use 42 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 5TM1637 DRIVER CONTROLLER: Connection module adopt TM1637 controller, the voltage is 5V, possess stable display, very reliable4 x Digit Tube4x Pin HeaderItem Type: 4 Digit TubeMaterial: PCB boardApplication: LED digital displayDigits: 4 Digit 7 segmentDriver IC: TM1637Voltage: 5V