Features:Support sensor (5V, 12V, 24V optional)Support 6 controllable fans and 2 normally open fans (5V, 12V, 24V can be selected separately)Type-C interface online printingSupport SPI, UART, IIC expansion, and connect for Raspberry Pi via SPI, UART, USB (Type-C) virtual serial portSupport U disk function. SD card offline printing Specifications:Type:446/429Product Size: 160x100mm/6.3x3.93 inchesMicroprocessor: ARM 32-bit Cortex-M4 CPUInput voltage: DC15-28V, the highest motor is 60VMotor drive: pluggable driveMotor interface: MOTOR0, MOTOR1, MOTOR2_1, MOTOR2_2, MOTOR3, MOTOR4, MOTOR5, MOTOR6, MOTOR7Temperature sensor interface: TB, T0, T1, T2, T3Display screen: BIGTREETECH-TFT, LCD12864, MINI12864, LCD2004, etc.PC communication interface: Type-C, easy to plug and unplug, communication baud rate 115200Expanded interface function support: material interruption detection, continuous printing after power failure, shutdown after printing, BL_Touch, etc.Support file format: G-codeRecommended software: Simplify3D, pronterface, Repetier-host, Makerware Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 Set MotherBoard