... current:1.3A-4.5A3.Mircostepping:1(1.8º),1/2,1/4,1/8,1/16,1/32,1/64,1/128,1/2561/5,1/10,1/25,1/50,1/125,1/2504 ... .Protect form : Overheated protect, lock automatic half current ,error connect protect5.Dimensions:118mm×76mm×33mm6.Weight:<300g.7 ... .Working environment:Temperature-15~40°C Humidity<90%.I/O Ports:1, VCC+:DC power positive ...