1,start-up 1m/s,cut-in 2.5m/s,high efficiency 2,magnetic levitation 3,safety, ... is sophia from TIMAR which a maglev wind turbine manufacture in shenzhen, China. our company sell the vertical wind turbine and wind ... have 4 big advantages:1,start-up 1m/s,cut-in 2.5m/s2,magnetic levitation,high efficiency3,safety, little vibration ...