1) This board is used to drive the LCD 1602 or LCD 2004 through I2C communication.
2) Reduce the number of pins used to connect from LCD module to Arduino board.
3) Operating voltage: 5Vdc.
4) Based on PCF8574 chip.
5) Power LED indicator.
6) Jumper cap for LCD backlight.
7) LCD contrast is adjustable through potentiometer.
8) Selectable I2C address. Default is 0x27.