Features: Using 32-bit ARM Cortex-M7 series STM32H743VI main control chip with a main frequency of 480MHz, the performance has greatly improved.. The SKR 3 EZ 3D control board adopts two types of driver sockets, which are compatible with-BIGTREETECH EZ-series driver modules and TMC-series driver modules. Each motor drive module- can select the corresponding motor voltage- through the jumper- cover. SKR 3 EZ numerical control fan realizes 24V, 12V, 5V voltage- selection through the external power supply module-, eliminating the need for the operation of the customer external transformer- module-, thereby reducing the probability of damage to the motherboard-. EZ Drivers- can achieve quietness when the motor is locked and running at low speed. It is recommended- to select when the maximum motor speed is lower than 300RPM; it can achieve quietness and low power consumption in a wide-range of speed and torque-. Specifications: Item: SKR 3 EZ 3D Control Board Support EZ2209/ EZ5160/ EZ2130 Stepper Driver Compatible TFT Series Touch-Screen Main Control Chip: using 32-bit ARM Cortex-M7 series STM32H743VI Main Frequency:480MHz Package Includes: 1 Set SKR 3 EZ Control Board 5PCS EZ2209 Stepper Driver 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!