OLED internal drive chip: SSD136 Compatible with 3.3V and 5V control chip I / O level Dimension: 29.28 x 27.1 mm (LW) Temperature: -30C to 70C Wide power supply range: DC 3V-5V Power: 0.06W Resolution: 128x64 Feature: GND: Power Gound VCC: 2.2V-5.5V SCL: CLK clock (High level 2.2V-5.5V) SDA: MOSI data (High level 2.2V-5.5V) Interface: IIC/I2C 0.96 Inch 4Pin IIC I2C OLED Display Module