| ♦FEATURES * Environmental friendly, no pollution and friendly to birds. * Mainly works on pneumatic force of the wind therefore it's not effect by turbulence or wind drag. * Works at low wind speed with cut-in wind speed at 2.5m/s and rated wind speed at 10m/s. * Simple to operate. * Safe in reaction to the wind rush. * Low noise, 46dB at rated wind speed 10m/s, and almost quiet most of the time * Widely used, can be adapted to city/subdivision residential area or backyard. |