Note: 1. OLED is self-luminous, no backlight! It will not have any reaction if you only connect it with power supply. You must program it and operate correctly, then it will display normally. 2. The blue and yellow areas are fixed and cannot be reset. Specifications: Super High Brightness Super High Contrast (Adjustable) Interface Type: IIC / I2C-4PIN High resolution: 128 * 64 Pixel Voltage: 3V ~ 5V DC Viewing angle: greater than 160 degrees Support many control chips: Fully for Arduino, for 51 Series, for MSP430 Series, for STM32 / 2, for CSR IC, etc. How to connect? GND : DC Negative VCC : DC Positive SCL : Serial Clock Input SDA : Serial Data Input Package included: 3* 0.96 Inch I2C OLED Display