This new SKR Mini E3 V3.0 motherboard uses the STM32F103RET6 main control chip, and its flash memory size is 512K. Because the fan on the SKR Mini E3 V2.0 control board is a CNC fan, you need to set the wind speed before using it. (Note: V3.0 version of the fan is not ready to use after power on). The hotbed MOS tube uses WSK220N04, low on-resistance, larger heat dissipation area, and reduced heat generation. BLTouch is an auto-leveling sensor for 3D Printers based on open-source. Simple, Smart, High-precision.It could work with any kind of bed material, such as glass, wood, metal, and so on. This kit with 80cm extension wire.