As the pin resources of Arduino controller is limited, your project may be not able to use normal LCD shield after connected with a certain quantity of sensors or SD card. However, with this I2C interface module, you will be able to receive 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 projects.
I2C Address: 0x3F
Supply voltage: 5V
The backlight and contrast is adjusted by potentiometer
Comes with 2 IIC interface, which can be connected by Dupont Line or IIC dedicated cable