On "Micro Cooling Fan" safety requirements, national standards set forth very detailed, consumers also can be a simple test. Qualified "Micro Cooling Fan", general adult fingers can not touch the fan grille and front, families with young children should choose dense fan grille. Odor is "Micro Cooling Fan" odor varnish coating on the copper produced at the time of the operation, in the purchase of fans have to smell it, to see this paint is environmentally friendly, whether through quality testing, let you out in the fresh enjoy the cool air, the wind.