Silent type with 72dBA noise . Powered by Chinese engine. Low fuel consumption. EPA, CE, ... cooling for heating exchange, communictaion interface, battery charger by main supply, daily fuel tank, ATS and paralleling system ... hours (accord to whichever reach first)from ex-factory date.During the guarantee period,our company will provide ... GB/T2820,GB755,BS5000, NAMAMG-22,YD/T502 Factory ViewCertificate