1.Specification:350W24V 350W36V No-load speed:2700rpm Load speed:2250rpm,Output torque:1.49N.m 2.Specification:500W36V 500W48V No-load speed:3000rpm Load speed:2500rpm,Output torque:1.91N.m 3.Specification:750W36V 750W48V No-load speed:3300rpm Load speed:2800rpm,Output torque:2.56N.m