KEYESTUDIO 1602 LCD IIC/I2C/TWI Display for Arduino Uno R3 Mega 2560 Raspberry Pi Avr Stm32 Bright and clear display-Blue background and white backlight, adjustable contrast Built with Arduino IIC/I2C interface to save 5 IO ports(the original 1602 LCD needs 7 IO ports to be up and running) Plug and play since it is perfectly compatible with the Arduino Liquid Crystal Library I602 is equipped with 4 pins in total. SCL should be connected to analog 5, SDA to analog 4, VCC to +5V and GND to ground Has Video, connection diagram, simple code for your reference, as well as FCC certification (it is excellent and really safe)