Bipolar constant current chopper for precise motor control. Optocoupler signal input for reliable operation. TTL-compatible electrical input for easy integration. Automatic idle current reduction saves energy. Perfect for applications like X-Y-Z tables, marking machines, laser cutters, engraving machines, and pick-and-place systems. Features: Material: Durable metal construction Color: Sleek black finish Voltage Supply: 9 ~ 42VDC Input Voltage: DC 12 ~ 48V Operating Temperature: -10 to 45 degrees Celsius Storage Temperature: -40 to 70 degrees Celsius Max Output: 4A Chopping Frequency: 20kHz Item Size: 9.2 * 7.8 * 3cm / 3.62 * 3.07 * 1.18in Item Weight: 127g Package Size: 12 * 8 * 4cm / 4.72 * 3.14 * 1.57in Package Weight: 148G Please Note: Item color may appear slightly different due to variations in lighting and monitor display. Package Includes: 4 x Motor Controller