Specifications: The current level by adjustable to meet your various application requirements. There are low-pressure shut-off, overheating parking and over-current protection circuit to ensure optimum performance. It is great for 42, 57 3A stepper within two-phase/four-phase/four-wire/six-wire stepper motor and it is not suitable for more than 3A stepper motor. Item Name: Single-Axis Controller Material: Vulcanized Fiber, Metal Working Voltage: DC 10V-35V Rated Output: ± 3A, Peak: 3.5A Model: TB6560 Subdivision: Full Step, Half Step, 1/8 Step, 1/16 Step, up to 16 Segments. Features: Single Axis, Adjustable Semi-automatic Flow, without Losing Step Size: 7.5cm x 5cm x 3.5cm/2.95" x 1.97" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Single-Axis Controller