It works without backlight, that is, in a dark environment OLED display is higher compared to that of LCD display you will like the miniature for its crispness.
The Driver chip of this OLED is SSD1306, which is compatible with IIC communication. So this module can be controlled by I2C.
That is, except the VCC and GND, 2 wires would be needed when using 4-wires I2C mode.
There is also a simple switch-cap charge pump that turns 5v into a low voltage drive for the OLEDs, making this module the easiest ways to get an OLED into your project.