Feature: 1. The Wind Generator blades have built-in copper sleeve inserts, which will not damage the nylon fiber when the bolt is tightened, making it difficult to deform or break. 2. The tightly designed hub groove and blades make the blades and hubs more precise. 3. The double groove ball bearings used in Wind Generator are thicker and not easy to shake when the machine is running. 4. Convenient to use and easy to install, perfect for household and industry use. 5. Adopts quality 3 phase permanent magnet ac generator , high efficiency and low noise, durable for long time use. Specification: Item Type: Wind Generator Kit Model: NE-300S3 Rated Power: 300W Maximum Power: 310W Optional Rated Voltage: 12V / 24V Start Up Wind Speed: Start Up Wind Speed: 2.0m / s Rated Wind Speed: 13m / s Survival Wind Speed: 50m / s Number Of Blades: 3 Blade Length: Approx. 630mm / 24.8in Installation Method: Hoop connection Blade Material: Nylon fiber Generator Type: Three phase permanent magnet ac generator Braking Method: Electromagnetic Electromagnet Wind Direction Adjustment: Automatically adjust windward Working Temperature: -40 ?? ?? 80 ??. Package List: 1 X Body 3 X Blade 1 X Fairing 1 Pack X Screw Set 1 X Spare Screw