1. 2.23-inch OLED expansion board for raspberry pie, 128 x 32 resolution 2. Built in SSD1305 driver, supporting SPI or I2C interface communication 3. Based on the for 40pin GPIO interface, suitable for Raspberry P-series motherboards, Nano 4. Support SPI or I2C interfaces. The default interface is SPI, which can be switched to I2C through resistance 5. Lead out the control interface to facilitate access to for /STM32 and other main control boards Driver chip: SSD1305 Communication interface: SPI/I2C Display size: 2.23 inches Display color: white Resolution: 128 x thirty-two Viewing angle: 160 Supply voltage: 3.3V/5V level: 3.3V Size: 65 x 30.8mm color:Blue Material:PCB Package Contents: 1 x 2.23 inch OLED expansion board 1 x RPi copper pole package 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.