LCD display module with blue black-light. Wide viewing angle and high contrast. Built-in industry standard HD44780 equivalent LCD controller. Commonly used in: copiers, fax machines, laser printers, industrial test equipment, networking equipment such as routers and storage devices. LCM type: Characters Can display 2-lines X 16-characters. Voltage: 5V DC. Module dimension: 80mm x 35mm x 11mm. Viewing area size: 64.5mm x 16mm Features IIC/I2C: Arduino 1602 I2C interface 4-wire 1602 screen IO port of Arduino control board is only 20, so IO ports is not enough for many sensor, SD card, relay modules. The original 16x02 screen need 7 IO ports to drive up, and this module can save five Input output ports4pin Cable for serial or I2C Communications1. VCC 5v3. TX Data or (SDA)4. RX Data or (SCL).