... (clean type,THDI<5%)Features:Accurate sine wave outputHigh reliability:IGBT technology ,micro processor control,uninterupted static bypass and ... ,status,measurement,alarm,LCD inside,multi-language. 5.Highest reliability and feasibility.N+X(parallel and redundant) function allows ... UPS by remote control emergency button.7.pre-maintenance.8.equiped nominal feedback protection. online interactive UPS