The I2c Connector Module Board use PCF8574 I2C chip that helps to converts I2C serial data to parallel data for the LCD display. It is compatible with 16x2 or 20x4 Character Display Module that supports 4 bit mode. It can have 8 modules on a singles i2c bus as well as the backlight can be controlled by the jumper and display contrast is adjustable by the potentiometer on the board.
