Lightweight, compact ring-turbine - Can even be installed on small buildings

Lightweight, compact ring-turbine - Can even be installed on small buildings
http://www.indiegogo.com/projects/highly-efficient-wind-generator

(http://www.diginfo.tv/v/13-0080-f-en.php)

Peace Frontier
Ring-style wind-generater

DigInfo TV - http://www.diginfo.tv