The wind leaf is the environmental air blower (cold), the main components should be installed in the wind leaf blade tip and highly attention: the bottom bracket motor must maintain three centimeters of above distance, because the wind leaf produce dynamic pressure is too high, tip will encounter stent fracture caused by wind leaf, The wind leaf and keep the wind barrels, otherwise a centimeter spacing have a screw loose stent, wind leaf will encounter barrel. Hope customers avoid damage installing.