For when you want to see what is going on.
OLED 128x64 mono display module can work without backlight. In a dark environment, contrast of OLED display is higher compared to that of LCD display, and OLED is thinner and lighter. OLED 128x64 is a monochrome graphic display module with built-in 0.96 inch, 128X64 high-resolution display. Module is connected via I2C/TWI and driven by as SDD1306 driver