This is IIC Serial 20X4 LCD module . With this I2C interface LCD module, you will be able to realize data display via only 2 wires. If you already has I2C devices in your project, this LCD module actually cost no more resources at all. It is fantastic for Arduino based project.
Interface: I2C I2C Address: 0x27(address can't be changed ) Sofware version :0022 SDA (DATA) -> analog input pin 4 SCL (CLOCK) -> analog input pin 5 Pin Definition : GNDVCCSDASCL Back lit Supply voltage: 5V Pcb Size : 60mm99mm Contrast Adjust : Potentiometer Backlight Adjust : Jumper