This LCD2004 is a great I2C interface for 2×16 and 4×20 LCD displays. With the limited pin resources, your project may be out of resources using normal LCD shield. With this I2C interface LCD module, you only need 2 lines (I2C) to display the information. If you already has I2C devices in your project, this LCD module actually cost no more resources at all. Fantastic for Arduino based projects.
1.Supply voltage: 5V
2.the back light and contrast is adjusted by potentiometer
3.Come with 2 IIC interface, which can be connected by DuPont Line or IIC dedicated cable
4.Compatible for 1602 LCD
5.This is another great IIC/I2C/TWI/SPI Serial Interface With this I2C interface module, you will be able to realize data display via only 2 wires.