... level < 65db 3.Less vibration,Easy install ,Free maintenanc 20kw WIND TURBINE Main technical data as follows:Power: 3kWBlade diameter: 5mRated rotated ... a large damping, good dynamic feature, and good toughness. Wind wheel and generator with flexible connections run smoothly without vibration or noise ... , water pump ,electric pan, color TV, lighter, fan , charger 20KW Wind Generator/Turbine