*use Brushless dc motor closed-end shell, small affection by environment * power saving 40~80% Similar products 45W our products 24.5W *step speed regulation/ stepless speed regulation design for customer requirement wide speed range *Low voltage start 90~250V without voltage Converter *jam 5~20S auto power OFF restart Similar products jam 5~20s Blown fuse motor burned *4 gears, 7.5 hours timer setting Similar products 3gear