Wea re offering stepper motor driver, feature: 1.it adopt special control circuit.the noise will be lower. 2.max. Reaction frequency could be up to 200kpps. 3.driver current could adjust 16 files from 0.5a/phase to 8.0a/pase. 4.the area of voltage:dc60-130v 5.size:80x200x156mm 6.net