1)Each generator 5hours test 2)Low noise,low fuel consumption 3)Good dynamic performance 4)Safty and reliable 5)CE,ISO9001 Specification of generator as follows:Main functions: 1) Power brands: Cummins, Perkins, deutz, Ricardo, Steyr,Volvo, or other china brands. 2) Alternator : Marathon or Stamford, China brand 3) Power range: 2-1000kw (3kva-1250kva) 4) Model: Open type, silent, soundproof, ...