BIGTREETECH SKR V1.4 Control Board With 5+Pcs TMC2225 V1.0 motherboard 3D printer control board Appearance size: 110*85mmInstallation size: 102*76mmmicroprocessor: ARM Cortex-M3 CPUInput voltage: DC12V-DC24V 5A-15ALogic voltage: DC 3.3VWIFI module: ESP-01SDriver working mode supports: SPI、UART、..