1,SSD1309 DRIVER CHIP: 54inch organic light emitting diode module built in SSD1309 driver chip, for RasPi motherboards, for STM32 and so on. 2,DRIVER INTERFACE: SSD1309 display module provides two kinds of driver interfaces, respectively 4 wire SPI and I2C interface, good compatibility and fast transmission speed. 3,128x64 RESOLUTION: 128x64 display module adopts 128x64 resolution, 0.254x0.254mm px size, more clear. 4,3V or 5V WORKING LEVEL: Organic light emitting diode module has on board level conversion circuit, compatible with 3V or 5V working level. 5,SOLDERING RESISTORS: There are two optional soldering resistors at the lower left corner of the module back, through the choice of resistors to select the corresponding communicate mode. 1 x SSD1309 1.54inch Display Module 1 x Connecting Line Item Type: SSD1309 1.54inch Display ModuleMaterial: Organic Light Emitting DiodeCommunicate Interface: SPI or I2CControl Chip: SSD1309Resolution: 128x64Display Size: Approx. 35.05 x 17.52mm or 1.38 x 0.69inPX Size: 0.254x 0.254mmMotherboard Size: Approx. 43 x 7.5mm or 1.7 x 3.0in Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.