Power-saving display: the I2c oled display performs the LCD display and with lower consumption sicne the IIC (I2C communications) simplifies connections; note that these I2C OLED display module comes without pin headersMore details: use compatible with , ESP8266, ESP32, STM32, etc.;Operating temperature: -40 - 85 Celsius; Resolution: 128 x 32Good compatibility: this i2c oled display module is compatitable with 4B/3B+/3B/2B/Zero, compatitable with , also compatitable for ESP8266, ESP32, STM32, etc.Driver IC:Size: 0.91 inch OLEDSize: 38 x 12 mmInterface type: IIC interfacePin description:GND: power groundVCC: Power + (DC 3.3 - 5V)SCL: clock lineSDA: data lineColour: Blue (White Light)Material:ABSPackage Contents:5 x I2C Display ModuleOnly 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.