This board uses the Allegro A4988 bipolar driver for stepper Motors.
The driver has: adjustable Current limitation, over Current protection and five different microstepping resolutions. It works from 8V to 35V and can supply 1A per coil without using forced ventilation or a heatsink.
We recommend reading the specifications of the circuit A4988
Includes heat sink
Operating voltage: 8-35 V
Output Current: 1 A continuous (2 A with heatsink)
Dimensions: 20.3 x 15.2 mm
LCMM032