Applications: big air volumes, high static pressure fan coils, duct fan units, outdoor air cool fans, and condenser fans Power: 50W 750W Number of pole: 4 poles, 6 poles and 8 poles Speed choice: by wire, single speed or multiple-speed Power supply: 110V / 220V / 230V / 415V, 50Hz / 60Hz, or designed upon special requests Insulation class: B class, F class Construction: steel shell, aluminum end frame and ball bearing IP level: IP20, IP44 Mounting: diversity choices based on customers' requirements