Features:
Driver IC: SSD1306
Size: 0.91 inch OLED
Resolution: 128 x 32
Font Color: white
Voltage: DC 3.3-5V
PIN Interface: IIC or SPI optional
OLED display, no need backlight, self-illumination, the display performance is better than the traditional LCD display, also lower consumption.

IIC Pin definition:
GND: Power Ground.
VCC: Power + (DC 3.3 ~5v).
SCL: Clock Line.
SDA: Data Line.

SPI Pin definition:
GND: Power ground
VCC: Power
CLK: Clock line
MOSI: Data cable
RES: Reset line
DC: Data/commands
CS: Chip select (when not use can be grounded directly)