Interface GND connected to the negative pole of the power supply, VCC connected to the positive pole of the power supply, SCL clock signal communication pin, SDA bidirectional data communication pin Powerful Functions: OLED display screen has a large viewing angle, low power consumption, high contrast, thin thickness, fast response speed, wide operating temperature range, can be used for flexible panels Simple Operation: OLED screen has multiple control instructions that can control the brightness, contrast, switch boost circuit and other functions, easy operation, rich features, can display Chinese characters, ASCII, patterns CName: OLED display Compatible with: for Arduino Working Voltage: 3.3V-5.5V Interface Type: PH2.0 4P terminal Standard Spacing of fixing holes: 8mm Fixing Hole Diameter: 4.7mm Color: As Shown Material: Plastic Package Contents: 1 * OLED Display Module Only the above package content, other products are not included Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.