... current:2~6A3. Mircostepping:1(1.8º),1/2,1/4,1/8,1/16,1/32,1/64,1/128,1/256 1/5,1/10,1/25,1/50,1/125,1/2504. Protect form ... +,REST-: motor free NOTE:1.When ambient temperature is high or working current over 3A, fix the module on big metal shell ... use axle flows fan dispels the heat, to make the module run reliably for a long time. 2.Half current automatically ...