Supports I2C protocols via the IIC/I2C port for reliable integration with I2C devices. Helps solve IO port shortages by enabling sensors, cards, or relay modules to be connected without using excessive control board pins. Backlit display with a potentiometer to adjust brightness and contrast, improving visibility in different environments. 4wire output provides a simple, compact wiring solution for easy installation. Use scenarios Expanding IO capacity in systems that require multiple I2C peripherals but have limited general purpose IO pins. Prototyping or development setups where quick, clean wiring and adjustable display visibility streamline testing. Small automation projects that involve combining sensors and relays through a single adapter for streamlined wiring.