... 118mm×76mm×33mm6.Weight:<300g.7.Working environment:Temperature-15~40°C Humidity<90%.I/O Ports:1, ... +,DIR-:Stepping motor direction input, voltage level touched off,high towards, low reverse7,ENA+,ENA-: motor free .NOTE:1 ... long time.2, Half current automatically: if control machine not send out signal in half second, driver enter ... Stepping motor driver,1.3A-4.5A,high quality and reasonable price