1、DRIVER IC: The module driver IC is for AIP650 (compatible for TM650), as well as supports multiple display characters. 2、4 DIGIT 7 SEGMENT: The digital tube display module is designed for 4 digit 7 segment, with stable and reliable performance. 3、CONTROL INTERFACE: With 4 pins, SDA is bidirectional data line, SCL is clock line, GND is for ground line, and VCC is power supply. 4、COMPACT STRUCTURE: The LED digital tube module is exquisite and compact, which can be flexibly used in a variety of situations. 5、WIDE APPLICATION: This module is suitable for Raspberry Pi 3 B+ 4, for DIY electronic devices, toy cars and instrumentation etc. Item Type: Digital Tube Module Model: DM43B04 Material: PCB Supply Voltage: DC 5V/3.3V Driver IC: AIP650 (compatible with tm1650) Interface: I2C (only two control signals, SDA SCL Data) Support Display Characters: 0,1,2,3,4,5,6,7,8,9,A,b,C,c,d,E,F,H,h,L,n,N,o, P,r,t,U, Other Board Wiring: Board: I2C TWI pins For Ethernet: A4 (SDA), A5 (SCL) For 20 (SDA), 21 (SCL) For Leonardo: 2 (SDA), 3 (SCL) For Due: 20 (SDA), 21 (SCL) Application: For Raspberry Pi 3 B+ 4; for MCU for AVR for PIC for ARM N76E003; for FPGA CPLD; Suitable for toy cars, for instrumentation, DIY electronics 1 x Digital Tube Module