Main Control ChipAdopt STMicroelectronics' latest G0 series main control chip STM32G0B1RET6 or STM32G0B0RET6; Three CNC FanIncrease the heat dissipation controllable fan to reduce the printer temperature when the device is working; Increased Heat SinkRedesign the drive heat sink, strengthen the drive heat dissipation capacity, and greatly improve the heat dissipation performance; USB Micro BThe PC communication USB interface is upgraded from Mini USB to Micro USB B, which is more adaptable; Output Power SupplyIncrease SPI output port +3.3V power supply, external SPI sensor power supply voltage +3.3V and +5V are optional, support the motherboard to directly supply power to peripherals.