Appearance quality inspection "Inflatable Air Blower", usually five to see: the outer and inner packaging without damage; the paint is bright pieces, with or without stripping, hanging paint; decorative pieces without injury; presence of rust and plating whether the peeling chrome plating; solder wire nets loose or fall off, followed by the power, press the keys low gear, "Inflatable Air Blower" start sooner the better. If you start slowly, or Dodo and go, and that is not good electrical properties. If you can not start, or need outside forces to start it, it shows poor electrical performance of the fan. If the low-normal start, we must stop by pressing the test, at slow, medium and fast speed three-block sound obvious difference between the dream and the House do not split the number of fern shoots do not sound as good. Fan at high speed, to observe the "Inflatable Air Blower" at the moment, shaking his head backward and pause time should be less than 1