1、51 Inch: 51 inch screen with expansion board, transparent screen, full viewing angle, 128x64 resolution. 2、Professional Chip: SPI I2C Screen Module has built in SSD1309 driver chip and uses SPI and I2C interface to communicate. 3、Two Interfaces: Transparent blue screen module adopts four wire SPI and I2C interfaces, with good compatibility and high transmission speed 4、Compatibility: SPI and I2C control interface switching, can be connected to main control boards such as for Raspberry Pi, for STM32, etc. 5、Welding Resistors: Two resistors can be welded on the back of the module, and the corresponding communication mode can be selected through the selection of the resistors. 1 x Screen Module1 x Expansion Board1 x Flat Cable5 x Screw5 x Nut Item Type:  1.51 Inch Screen ModuleMaterial: GlassModel: 1.51 Inch TransparentWorking Voltage: 5V 3.3VCommunication Interface: SPI I2CControl Chip: SSD1309Resolution: 128x64Function Pin:VCC: Power Supply Positive (5V 3.3V Power Input)GND: Power GroundDIN: Data InputCLK: Clock Signal InputCS: Chip Selection, Active at Low LevelDC: Data, Order, Low Level Indicates Order, High Level Indicates DataReset: Reset, Active at Low Level