... line interference Features:Inverter Parameters:1.SPWM technology, pure sine wave output2.CPU control, advanced anti-jamming ... technology, good electromagnetism compatibility 3.LCD+LED display, easy to operate4.Vertical, 19 inch rack ... protection6.AC main supply, DC main supply, pure DC power supply7.inverter parameters:Model/seriesNP800SNP800DNP800ECapacity1KVA~10KVA1KVA~20KVA1KVA ...