Welcome to our store! This USB motion control board offers several advantages: compact size, ease of use, and strong anti-interference capabilities. No USB drivers are required; simply connect it to your computer. It's compatible with all Windows versions and fully supports all Mach3 versions. Features: Supports 4-axis linkage, allowing you to connect four stepper motor drivers or servo drivers. Maximum step-pulse frequency of 100KHz, suitable for servo or stepping motors. Supports automatic probing tools. Supports emergency stop input. Supports limit switches. Supports electronic handwheel connection. Requires an external 24V DC power supply to isolate USB and external ports for a more stable system. Features a 0-10V output port, enabling spindle motor speed control via Mach3 software. 4 general-purpose inputs for connecting limit switches, emergency stop switches, probe switches, and other devices. 4 general-purpose isolated relay output interfaces, capable of driving four relays to control spindle start, forward rotation, reverse rotation, pumps, and other devices. 1 status LED to indicate the board's connection status. Specification: Product Name: MACH3 Motion Control Board Support Axis: 4 Support Driver Type: Stepper Motor/Servo Driver Maximum Step-Pulse Frequency: 100KHz Package List: 1 x Mach3 Motion Card, 1 x Cable Please allow slight errors due to manual measurement and different monitors. 100% Satisfaction: Our customers are our top priority. If you encounter any product issues upon receiving the goods, such as damage or incorrect quantity, please contact the seller immediately. We will do our best to provide you with satisfactory customer service. Thank you for choosing our store. We hope this information is helpful. Wishing you a happy life.