GF2 series open frame diesel generator set: 1,output:5-600kw 2,frequency:50/60hz 3,voltage:depend on your choice. 4,engine brand:weichai,changchai,shangchai,deutz,cummins,perkins. 5,alternator:brush,brushless, stamford,leroy somar. notice:you can choose ATS, AND AMF,GTR series.