DFR0645 4-Digital LED Segment Display Modules DFRobot DFR0645 4-Digital LED Segment Display Modules feature an 8-level adjustable brightness, standard IIC port, and a small 67mm x 22mm package size. The Display Modules are offered in either red or green with an 8 segment x 4 digit display mode. The DFR0645 Display Modules offer independent control of the decimal points. Additionally, the DFR0645 Display Modules have a 5V operating voltage, <,55mA operating current, and an operating temperature range of -40ºC ~ +85ºC.