SignalKing SD001 CNC Micro-Stepping Stepper Motor Driver WE ARE NOW IN A BIG CLEARANCE SALE OF SEVERAL INVENTORIES. DONT MISS IT! High integration, high reliability and with Anti-high-frequency interference ability. Interface with ultra high-speed opto-coupler isolation and the maximum input voltage is DC40V (peak value). Owning reverse connect protection, automatic overheat protection and automatic semi-flow lockout. The maximum output current is 3A and there is 4-speed adjustable. Ideal for a variety of small and medium sized automation equipment and instruments.