1. It is suitable for parallel port control supported by and other computer software. 2. The USB power supply is separated from the power supply of the peripheral equipment to protect the of the computer. 3. Peripheral wide voltage input, 12-24V, with anti-reverse function. 4. All input signals are completely isolated, the lotus lamp is isolated, and the operation can be stopped by , which limits the of the computer. 5. All the way to the relay output port. Control the spindle switch. Output port P17 port. All the way through the optocoupler isolation 0-10V analog voltage output, which can be controlled by the corresponding analog interface converter to control the spindle speed. Output port P1 port. Open all 17 ports, which can be accessed through the optocoupler driver. Can control 5-axis stepper motors. P1 as a PWM output can be controlled by inputting the spindle speed governor through the optocoupler. The 5V driver can be connected to the common cathode or common anode input level. Weighs approximately 122 colour: blue Material: metal + PCB size: 89x68x19mm Package Contents: 1 x Engraving Machine Driver Board Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.