Power Coverage:20KW~1100Kw Rated Voltage:400V/230V Speed:1500/1800rpm Alternator:KWISE/HENGFA IP&Insulation:IP22-23&F/H Frequency:50Hz/60Hz Excitation Type:Brushless Self-Excitation Controller:Smartgen/Deepsea/Comap/Others Electronic Components:CHNT/DELEXI/Others Silent&Supper Silent60-70db At 7m Side