... ×76mm×33mm6.Weight:<300g.7.Working environment:Temperature-15~40°C Humidity<90%.I/O Ports:1, VCC+:DC ... ENA+,ENA-: motor free .NOTE:1, When ambient temperature is high or working current over 2.7A, fix the ... damaged, but the electrical machinery runs abnormally, shake , and output is small.Please check whether the wiring of ... dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price