Features: Brand new and high quality With the external MOSFET, it can support high voltage and larger current, and current can reach 8A (because the module is limited by size and connector, the current cannot exceed 3A). Low heat generation, which is far lower than that of 2100, 2130, and other driver. It can prevent the motor from shaking.Not easy to lose step.Can drive 57 stepper motor. The newly developed board frame is used to matching the new connector so that customers can experience the aesthetic feeling and avoid the accident of the old driving pin stabbing the hand. Using a new type of specially made heat sink to enhancer the heat dissipation as well as protect driver chip from external damage. Specifications: Material:ABS Type:1Pcs/2Pcs/5Pcs Package Includes: 3 Optional Package: Package 1 Include:1Pcs Driver Board Package 2 Include:2Pcs Driver Board Package 3 Include:5Pcs Driver Board note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.