Support all kinds of Arduino microcontroller line, without any wiring.
The integrated voltage regulator IC, supports 5V or 3.3V power supply.
On-board level translation programs truly perfectly compatible 5V / 3.3V IO level, supports a variety of single-chip IO connection
The integrated backlight control circuit, can be controlled on-off or PWM dimming.
The integrated SD card expansion circuit，Reserved SPI FLASH font circuits to facilitate the expansion application.