Convenience.Interface Selection: to choose SPI or IIC interface through R3, R4, R5For IIC communication, it is necessary to move the resistor on R4 to R3, and R5 is soldered with 0 ohm resistor.SPI communication or I2C communication can be switched by configuring three resistors R3 R4 R5Driver IC: SSD1309Resolution: 128 x 64SPI interface definition:1.GND ( ground)2.VCC ( supply positive)3.SCL (clock line)4.SDA (data line)5.RES (reset line)6.DC (data / )7. (chip select)Types: white fontColour:blueMaterial:plasticSize:Diagonal Screen Size: 2.42 inchPackage Contents:1 x Display ModuleOnly the above package content, other products are not included.Note: Light 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.