Features: Adopts 32-bit ARM Cortex-M7 series STM32H723ZET6 master- chip with a main frequency of 550MHz; Upgraded with eFuse- protection, which responses faster with strong protection, effectively protecting the motherboard- from being damaged. Use the 10-axis EZ drive socket to avoid finger pricking; SPI- and UART operating modes driven- by on-board TMC-can be used only through firmware settings; Reserve proximity-switch interface, support NPN- and PNP- type selection three-way four-wire fan interface can be used to connect water cooling device. The CNC- fan 24V, 12V and 5V-voltage can be selected, which can save the operation of the customer external transformer- module- and effectively reduce the damage probability of the main board Specifications: Item：BIGTREETECH Octopus Max EZ V1.0 Control Board Master-Chip:Adopts 32-bit ARM Cortex-M7 series STM32H723ZET6 Main Frequency: 550MHz Support Running Klipper Firmware for Voron 2.4 Size：As Pictures Material: Plastic Package Includes: 1 Set BIGTREETECH Octopus Max EZ V1.0 Control Board note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!