... .18 months warranty, 4. CE, ISO. 300KVA Automatic voltage regulator:1. 300KVA Automatic voltage regulator,2. Automatic voltage regulator,3. Output voltage: 380v+-1%,4. CE, ISO9001-2000 certifications.5 ... ~495V,2.Input frequency: 30~70Hz ,3.Output voltage: 220V±0.5%,4.Output frequency:50Hz±0.01% ,5.Wave ...