Frentaly&reg; IIC/I2C/TWI 1602 Serial Yellow Green Backlight LCD Module for Arduino UNO R3 MEGA2560 16 X 2, 1602 Displays 2-lines X 16-characters Operate with 5V DC. You can connect directly to arduino board Module dimension: 80mm x 36mm x 15mm Viewing area size: 64.5mm x 16mm Arduino IIC/I2C interface was developed to reduce the IO port usage on Arduino board