High precision of output voltage. Over vlotage protection compact size,light weight continuous and stable voltage,wide range of regulation. model:SVC-500VA SVC-1000VA SVC-1500VA input voltage:150v-240v output voltage:220v±6% over voltage protection:246v±4v frequency:50HZ/60HZ usage area:computer,copy machine,testing equipments,lighting equipments,tv equipments,medical equipments,communicating equipments,industrial automation etc.