Supports 4-axis linkage, allowing connection of four stepper motor or servo drives. Maximum step pulse frequency of 100KHz, suitable for servo or stepper motors. Supports automatic probe tool. Supports emergency stop input. Supports limit switches. This USB motion control card is compact, easy to use, and features strong anti-interference capabilities. No USB driver installation is required; it works after connecting to a computer and supports all Windows versions and Mach3 versions. Features: - 4-axis linkage support - Max step pulse frequency: 100KHz - Automatic probe tool support - Emergency stop support - Limit switch support - Electronic handwheel connection support - Requires external 24V DC power supply for stable operation. - 0-10V output port for spindle motor speed control via Mach3 software. - 4 general-purpose inputs for limit switches, stop switches, probe switches, etc. - 4 isolated general-purpose output interfaces for controlling relays, spindle starters, pumps, etc. - Status indicator light for connection status. Specifications: Product Name: MACH3 Motion Control Card Supported Axes: 4 Supported Driver Type: Stepper/Servo Driver Maximum Step Pulse Frequency: 100KHz Weight: Approx. 128g/4.5oz Package List: 1 x Mach3 Motion Card, 1 x Cable.