ITEM NAME:Blue Serial IIC I2C TWI 2004 20x4 Character 5v LCD Module Display for Ardui H2R4 Blue Serial IIC I2C TWI 2004 20x4 Character 5v LCD Module Display for Ardui H2R4 Features : Latest Iic Lcd2004-Character Lcd Display Module, A New High-Quality 4 Line 20 Character Lcd Module Not Only Set The Contrast Control Knob Selector Switch Also Has A Backlight And Iic Communication Interface. For Arduino beginners, not for the cumbersome and complex LCD driver circuit connection and a headache, the real significance of this LCD module will simplify the circuit, this module directly into the Arduino Sensor Shield V5.0 sensor expansion board IIC device interface can, GM 4P sensor connection cable, programmed through the Arduino controller, you can easily identify the slogan, sensor data records Specification: Interface: I2C I2C Address: 0x27 Pin Definition : GND〠VCC〠SDA〠SCL Back lit (Blue with White char color) Supply voltage: 5V Size : 60mm×99mm Contrast Adjust : Potentiometer Backlight Adjust : Jumper Packageï ¼Å¡ 1 X 2004 5V 20X4 LCD Module Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..1 X 2004 5V 20X4 LCD Module. Interface: I2C. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. Back lit (Blue with White char color).