ALEKO WG700 12-Volt 3-Blade 700 Watt Wind Generator 700 Watt 12 Volt system uses wind to generate power and run your appliances/electronics Wind turbines include generator, 3 blades, tail, screws/bolts. Constructed from lightweight, weatherproof cast aluminum Speed regulation method: Mechanical Yawing+ Electromagnetic Brake Latest 2011 design with 3 new blades, Blade material: fiber glass