Feature: 1. HIGH EFFICIENCY: This wind turbine has high wind energy utilization and efficiency, with low vibration, stable operation, easy to install and maintain. 2. AC GENERATOR: Adopting neodymium iron boron dilute permanent magnet synchronous AC generator, with low noise and a starting speed of 3.5m/s. 3. RATIONAL DESIGN: Tailless appearance design, support 360 degree automatic adjustment of windward direction, with electromagnetic and controller unloading. 4. WATERPROOF BLADE: The wind turbine blades are made of mixed fiber nylon basalt material, corrosion resistance, which is lightweight and waterproof. 5. WIDE APPLICATION: This wind turbine kit is widely used in charging scenarios for home monitoring, RV, boat, pavilion, cabin, ocean, and any other home use. Specification: Item Type: Wind Turbine Kit Model: K1 500W Blade And Shell Material: Mixed Fiber Nylon Basalt Material Motor Shell Material: Aluminum Alloy Rated Power: 500W Maximum Power: 550W Starting Wind Speed: 3.5m/s Rated Wind Speed: 10m/s Safe Wind Speed: 65m/s Maximum Wind Speed: 70m/s Rated Speed: 680R/M Wind Turbine Diameter: Approx. 53.8cm / 21.2in Front End Diameter: Approx. 65cm / 25.6in Rear End Diameter: Approx. 75cm / 29.5in Wind Hood Thickness: Approx. 21cm / 8.3in Starting Torsion: 2.36N·M Rated Torsion: 25.9N·M Generator Type: Neodymium iron boron dilute permanent magnet synchronous AC generator Windward Direction: 360 degree automatic adjustment Control System: Electromagnetic, controller unloading Wind Direction Adjustment: Tailless Automatic Adjustment Bearing Temperature Range: -43-82℃. Package List: 1 x Main Shaft1 x Blade2 x Outer Covers1 x Controller1 x Rotating Body1 x Red Cover19 x Screws19 x Nut19 x Spring Pads19 x Gaskets1 x M16 Nut1 x Gasket1 x User Manual Note: There may be some error in manual measurement.