100% brand new and high qualitySize:75*50*35(mm)(LxWxH) / 2.95''x1.96''x1.37'' (approx)Rated maximum output: �� 3A， peak 3.5A.Working voltage DC 10V-35V. Recommended to use a switching power supply DC24V power supply.Using the Toshiba TB6560AHQ new original chip with low voltage shutdown， overheating stop and over current protection circuit to ensure optimal performance.For two-phase within 42，57 stepping 3A / four-phase / of line four / six-wire stepper motor， and is not suitable for more than 3A stepper motor. Automatic half current function.6N137 high-speed optical coupling， guarantee high speed without losing step.Subdivision: whole step， half-step， step 1/8， 1/16 step， a maximum of 16 Subdivisions.Features similar products:current grade-by-adjustable to meet your demand for a variety of applications.semi-automatic flow adjustable.6N137 high-speed optical coupling， guarantee high speed without losing step.plate printed setup instructions operation without manual also.thick teeth radiator， good heat dissipation.Package Includes:1PC��Stepper Motor Drivers