Feature: -Traditional coil and core transformer -Compact size and light weight -Resin filled and vacuum potted -High reliability and long life Environmental Specification: -Operation temperature -20~40 -cooling convecation -Relative humidity 5% to 95% -Installation:Indoor and outdoor Support: -one year vorranty -Safety switch -ISO9001:2000 certifiation -CE certification -Patent NO:ZL 200530033388.7