1,applied for electric scooter 2,working voltage 48~60V 3,power 2kw~3.5kw 3,max speed 45km/h~50km/h 4,certificate ISO9000 1, using enamelled copper aganist high temperature.2,using NdFeB magnet with high performance,power density,high efficiency wheelsizerated powerrated currentrated voltagerpmwithout loadingmax power12inch2kw40A48v590rpm3.5kw 48v brushless dc motor