1. adjustable two speed cooling motor 2. 245w, 4/ ... CCC, CE, UL certificates 4. much export experience Features 1, with a hard mechanical properties, good stability, 2, no ... , obtain higher efficiency of the smooth speed regulation characteristic.1, high efficiency, speed control process no additional loss;2 ... is high, and our common series controller fit, speed rate is not more than 2.5 %,d our factory ...