The IIC 2004 LCD display module is a 4 line 20 character LCD module with a manual contrast control knob, backlight and i2c communication interface.

The library that works with this display can be installed directly in the Arduino IDE Library Manager: LiquidCrystal I2C by Frank de Brabander.

Using the "HelloWorld" example sketch change the definition of the LCD to: LiquidCrystal_I2C lcd(I2C_address,20,4); 

The screen's address might vary, for that reason it could be useful to use the I2C_scan code available in this link.

Specification:

Supply voltage: 5V
Interface: I2C
I2C address: 0x27 or 0x3F
Pin definition: GND, VCC, SDA, SCL
Contrast adjust: potentiometer
White text, blue backlight
It is fantastic for based project
Screen size: 9.6cm x 4cm x 1cm
Mounting board size (including LCD): 9.8cm x 6cm x 2cm