Features:
1. Suitable for driving stepper motors under 8V~35V 2A.
2. Very simple step direction control interface.
3. Five different stepped modes: full, half, 1/4, 1/8 and 1/16.
4. Adjustable potentiometer can adjust the maximum current output to get better step rate.
5. Automatic current decay mode detection selection.
6. High heat resulting circuit disconnection, undervoltage lockout, crossover current protection.
7. Ground short protection and load short protection.
8.Mixed with slow current decay modes.
9.Synchronous rectification for low power dissipation.
10.Adjustable current control lets you set the maximum current output with a potentiometer.
11.The drive current: 2A (best to install the heat sink).

Specifications:
3.3 and 5 V compatible logic supply
Size: 20 x 15 x 11mm
Heat sink: 9 x 9 x 5mm
Color: Red

Applications:
Widely used in Stepper motors, 3D printer, small CNC machines, engraving machines, Supported 3d printers like Prusa Mendel, ultimaker, printbot and so on.

Package contains:
3PCS A4988 Stepper Motor Driver