1. The working voltage is DC 10V-35V. It is recommended to use a switching power supply DC24V for power supply.2. Using 6N137 high-speed optical coupling to ensure high speed without losing step.3. Using Toshiba TB6560AHQ chip, there are built-in low-voltage shutdown, overheating shutdown and overcurrent protection circuits to ensure performance.4. The rated output (max) is: +/-3A, with a vertex value of 3.5A.5. It is suitable for two-phase/four-phase/four-wire/six-wire stepping motor with 42,57 stepping within 3A, but not suitable for stepping motor with more than 3A.6. Automatic half-flow function.7. Subdivision: Full step, half step, 1/8 step, 1/16 step, maximum 16 subdivision.8. Dimensions: Width 50 x length 75 x height 35 (MM)9. Weight: 83G10. This module does not have any protection circuit, so you must be very careful when using it, otherwise the chip is easy to burn out.Features in similar products:1. The current level can be adjusted step by step to meet your multiple application requirements.2. Automatic half flow is adjustable.3. Using 6N137 high-speed optical coupling to ensure high speed without losing step.4. The board printing instructions can be operated without manual.5. Adopt thick and densely toothed radiator for good heat dissipation.Specification: Package Weight One Package Weight 0.09kgs / 0.20lb One Package Size 25cm * 15cm * 3cm / 9.84inch * 5.91inch * 1.18inch Qty per Carton 100 Carton Weight 11.00kgs / 24.25lb Carton Size 52cm * 32cm * 32cm / 20.47inch * 12.6inch * 12.6inch Loading Container 20GP: 500 cartons * 100 pcs = 50000 pcs40HQ: 1162 cartons * 100 pcs = 116200 pcs