1、8 Drivers: 3D printer motherboard display kit supports 8 TMC stepper drivers, supports Uart and SPI, and all IOs can withstand 5V voltage. 2、Multiple Switch Sockets: 3D printer motherboard set has multiple limit switch sockets 24V/5V/3.3V selectable, ready for more other devices such as inductive sensors, BL Touch. 3、8 PWM Fans: 3D printer motherboard for Spider V3.0 up to 8 PWM fans (1 extruder only, no 12V/24V RGB), 2 RGB LEDs (12V and 24V selectable), 1 5V RGB LED (NEO WS2812). 4、2 Interfaces: 3D printer mini 12864 display combination kit has 2 high voltage driver interfaces and 10x PWM power MOSFET outputs. 5、Easy to Use: 3D printer part set is installed and ready to use, and complete tools, very easy to install, support system for Rpi, for Spider. Item Type: 3D Printer Motherboard for Spider V3.0 Material: PCB PCB Layers: 6 Layers Main Control: STM32F446 Display: Mini12864 Original Screen Flash Memory: 512K DC Input: 12V and 3A DC-DC For RPi Power Supply: 5V and 5A DC-DC Fuse: 2+1 3.3 Power Supply: 2 (MUC and Motor Are Powered Separately) Drive TVS: 8 Heating Rod: 4 Digital Control Fan: 6 Normally Open Fan: 2 Module:Support Support Firmware: for Klipper, for Marlin, for RRF Support System:For RPi, for Spider 1 x Motherboard 1 x Mini12864 Display 1 x Type C Cable 3 x Connecting Lines 30 x Pin Shells 1 x Connector 1 x Plastic Knob