... ,low power consumption 2.High microstep,high torque 3.broad voltae range 4.wide output ... connect protect5.Dimensions:118mm×76mm×33mm6.Weight:<300g.7.Working environment:Temperature-15~40°C Humidity<90%.I/O ... -: motor free .NOTE:1, When ambient temperature is high or working current over 2.7A, fix the module on big ... dimension Stepping motor driver,1.3A-4.5A,high quality and reasonable price