Product description 128x64 LED display module for Ar-duino, supports many control chip. Fully compatible with for Ar-duino, 51 Series, MSP430 Series, STM32 / 2, CSR IC, etc. Ultra-low power consumption: full screen lit 0.08W Super high brightness and contrast are adjustable With embedded driver/controller Interface type is IIC I2C/IIC Interface, need 2 IO only. Resolution: 128X64 Drive Duty: 1/64 Duty Viewing angle: greater than 160 degrees Pins: 4 pins Pin Definition: GND, VCC ,SCL, SDA 1:GND(OLED power supply) 2:VCC (OLED 3.3~5V) 3:SCL(OLED IIC Clock line) 4:SDA(OLED IIC Cable) Voltage: 3V ~ 5V DC Working Temperature: -30 ? ~ 70 ? Drive Duty: 1/64 Duty High resolution: 128 x 64 Driver IC: SSD1306 Package Included: 1 X 128x64 LED display module for Ar-duino