... /4,1/8,1/16,1/32,1/64,1/128,1/2561/5,1/10, ... 5V (Rising edge effective , rising edge duration >10μS)6,DIR +,DIR-:Stepping motor direction input, ... voltage level touched off,high towards, low reverse7,ENA+,ENA-: motor free . ... the module on big metal shell , or use axle flows fan dispels the heat, to make ... Stepping motor driver,1.3A-4.5A,high quality and reasonable price