1、Type C USB Interface: The implementation of the type C USB interface not only enhances stability but also offers faster data transfer speeds and improved reliability, ensuring a secure and consistent connection for seamless communication between devices. 2、GRBL 1.1 Firmware: The upgrade to GRBL 1.1 firmware brings enhanced performance and stability to the engraving machine offline controller kit. This firmware version is known for its advanced features, accurate control over the CNC machine, and compatibility with a wide range of applications, making it a good choice for accuracy machining tasks. 3、Good Compatibility: With support for our company's specifically designed offline engraving modules, users can easily update the firmware directly using the offline module. This feature allows for convenient firmware upgrades without the need for a constant internet connection, providing flexibility and ease of use for CNC machine operators. 4、High Accuracy: The mainboard's capability to support PWM or TTL signal control for the spindle enables users to achieve accurate control over the spindle speed within a range of 0 to 100%. This level of control is essential for achieving different cutting depths, speeds, and spindle operations, enhancing the overall accuracy and efficiency of the CNC machining process. 5、Overcurrent Guard: The incorporation of overcurrent guard in the stepper motors ensures the safety and longevity of the components, safeguarding against potential damage due to electrical issues. Furthermore, the modular plug and play design of the stepper motors makes maintenance and replacement tasks more convenient, reducing downtime and enhancing the overall user experience with the 3 axes Offline controller board kit.