Feature 1We have adopted the proven RUMBA + hardware designing and upgraded it with the new processor STM32F446. 2The products have a clock rate of 180MHz, 512Kb of flash memory and 128Kb of SRAM, all built on a high-performance ARM architecture. 3RUMBA32 is a 32-bit control board, it will not force you to change the entire printer to adapt to it. 4Like RUMBA+ and RAMPS, the product supports universal character and graphic LCD. 5The product is easy to for installation and convenient to carry for its perfect size.Item Type:RUMBA32 main control boardInput Voltage (Recommended): 12-24VInput Voltage (Limit): 6-35VStepping Driver: 6 (SupportSPIsocket StepStick)MOSFET Output: 6Maximum Bed Current: 20AMaximum Heater Current: 5ANumber of Thermistor Connections: 5Limit Switch: 6Firmware:Marlinbufix-2.0 Package List 1 x Rumba Main Control Board1 x USB Data Cable1 x 2004 LCD Display1 x Adapter Board2 x Gray Cable1 x NutNotePlease note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.