Features: 1.STM32F446 Chip: This V3.0 32Bit control board adopts STM32F446 main control chip and supports 180mHz 32Bit frequency, providing more stable performance. 2.8 PWM Fan: This 3D printer silent board is designed with 8 PWM fans (only use 1 extruder, do not use 12V or 24V RGB), 2 RGB LED (12V and 24V optional), 1 5V RGB LED (for NEOPIXEL or WS2812). 3.8 Stepper Driver Supported: This V3.0 control board supports 8 TMC stepper motor drivers, and UART and SPI are supported as well. 4.10 PWM MOSFET Output: This STM32F446 control board supports 10 PWM power MOSFET output (1 for HotBed, 3 for hot end, 3 for fan, 3 for RGB LED strip). 5.Supported System: This 32bit silent board supports for Klliper, for Marlin, for RRF firmware, suitable for RasPi, for Spider system, meeting your needs. specification:Item Type: V3.0 Control Board Material: Printed Circuit Board Main Control Chip: STM32F446 32bit Main Frequency: 180mHz Support: WiFi Module Supported Firmware: for Klliper, for Marlin, for RRF Supported Systems: for RasPi, for Spider PackageList:1 x V3.0 Control Board 1 x Power Cord 1 x Connecting Cable 1 x Accessory Kit