Features: 1.51 Inch: 1.51 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. specification:Item Type: 1.51 Inch Screen Module Material: Glass Model: 1.51 Inch Transparent Working Voltage: 5V 3.3V Communication Interface: SPI I2C Control Chip: SSD1309 Resolution: 128x64 Function Pin: VCC: Power Supply Positive (5V 3.3V Power Input) GND: Power Ground DIN: Data Input CLK: Clock Signal Input CS: Chip Selection, Active at Low Level DC: Data, Order, Low Level Indicates Order, High Level Indicates Data Reset: Reset, Active at Low Level PackageList:1 x Screen Module 1 x Expansion Board 1 x Flat Cable 5 x Screw 5 x Nut