The module is based on a decimal point display module, it displays four digital tube (0.56 inches), and driver IC is TM1637, only two signal lines can make MCU control four Digit 8-segment LED. Can be used to display decimal, letters and so on. 4 digit red alpha-numeric display 8 adjustable luminance levels Power Supply should be 3.3~5.25VDC Interface level can be 5V or 3.3V 4 screw mounting holes whose diameter is 2.2mm A product for Arduino that works with official Arduino boards
Item Min Typical Max Unit Power Supply(VCC) 3.3 5 5.5 VDC Current（@VCC=5V） — 30 80 mA Dimensions 5.7X2.3X1 cm