8 Pieces IIC/ I2C/ TWI LCD Serial Interface Adapter and LCD Module Display Blue Backlight Compatible with Ardui no R3 MEGA2560 (LCD 1602 16 x 2) Features: Components: blue LCD display with i2c serial interface backpack; LCD screen can display 2-lines x 16-characters; The i2c LCD adapter built-in industry standard HD44780 equivalent LCD controller Default Address: 0 x 27 for PCF8574T chip; 0 x 3F for PCF8574AT chip; Please kindly check the chip of the i2c interface; Compatibility: LCD display with I2C serial interface is compatible with for Ardui no and Raspberry pi; Working voltage: 5V; To come with a potentiometer, which is applied to adjust backlight and contrast; How to wire: GNDGND; VCCVCC; SDAA4; SCLA5 Application: LCD module is applied to display characters, letters, numbers, real time clock and temperature Display function: LCD display with I2C serial interface can be applied to display real time clock, temperature, humidity and so on; (A potentiometer is also necessary to adjust the contrast; Working Voltage: Only 5V ) Specifications: LCD controller: HD44780 Adjust Contrast: Potentiometer Package included: 4 x Blue LCD display 4 x I2 C serial interface