VERTICAL WIND TURBINE 2000-3500 WATTS, 12 DC VOLTS EXTERNAL CONTROLLER NOT REQUIRED FREE POWER ENRGY BY AIR NO MONTHLY BILLING Description Packaging included: 4 x Rotor blades 1 x User Manual Include: mounting accessories Not included: mounting post SPECS: Color: Green Rated power：2,000W Maximum power：3,500W Rated voltage：12V DC Start up wind speed：2m/s Rated wind speed：11m/s Survival wind speed：45m/s Top net weight ：12.0kg Wheel diameter：0.9m Blades number：4 Blades material: Nylon fiber Generator: Three phase permanent magnet ac generator Control system :Electromagnet Speed regulation: Automatically windward Working temperature:-40℃～80℃