Online ups power supply1-3KVA,online double conversion,high frequency,single phase,LED or LCD,RS232 & USB (optional) Name: high frequency online UPS(1-3KVA), UL CertificateUL Number: E337869Main Features:Online double conversionHigh input power factorWide input voltage rangeFull protection functionAutomatic bypassEPO functionHigh reliability and performanceIntelligent RS232, USB communication ...