Specification: Item Type: Stepper Motor Driver Module Material: PCB Operation Module: STEP DIRorUART Power Supply Voltage: 4-36v Peaking Current: 3A Current Rms: 2A Maximum Microsteps: 256 Microstep Settings: 2, 4, 8, 16 (can Be Divided into 256) Package List:1 x Stepper Motor Driver Module 2 x Heat Sink1 x Screwdriver 256 Microstep Subdivisions: STEP DIR interface, input pulse 2/4/8/16 subdivision optional, the internal automatic increase to 256 subdivision. Ultra Low Noise: Ultra low motor noise, AGC can automatically torsion compensation in a wide speed range. Support Uar Mode: The stepper motor driver module FLAG function abnormal indication, support Uar mode. Current Adjustment: The stepper motor driver module can adjust the current through adjustable resistance or software. Premium Material: Made of PCB, it is strong, durable, not easily damaged, and has a long service life. 256 Microstep Subdivisions: STEP DIR interface, input pulse 2/4/8/16 subdivision optional, the internal automatic increase to 256 subdivision. Ultra Low Noise: Ultra low motor noise, AGC can automatically torsion compensation in a wide speed range. Support Uar Mode: The stepper motor driver module FLAG function abnormal indication, support Uar mode. Current Adjustment: The stepper motor driver module can adjust the current through adjustable resistance or software. Premium Material: Made of PCB, it is strong, durable, not easily damaged, and has a long service life.