brand new and high quality brand new and high quality Quantity: 1pc Size:75*50*35(mm)(LxWxH) / 2.95''x1.96''x1.37'' (approx) Rated maximum output: 3A, for peak 3.5A. Working voltage for DC 10V-35V. Recommended to use a switching power supply DC24V power supply. Using the for Toshiba TB6560AHQ new original chip with low voltage shutdown, overheating stop and over current for 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: 1 current grade-by-adjustable to meet your demand for a variety of applications. 2 semi-automatic flow adjustable. 3 6N137 high-speed optical coupling, guarantee high speed without losing step. 4 plate printed setup instructions operation without manual also. 5 thick teeth radiator, good heat dissipation.