... ; 3.UPS monitoring software; 4.AC surge suppressor; Sine wave ups (1K 2K 3K) Key features: H series ... the most demanding and delicate of applications. a).Sine-wave outputTrue sine-wave output with less than 3% THDb).Double conversion ... and vice versaLED indicatorsStatusLoad level/battery level, battery , utility power, inverter, bypass, overload, faultAudible alarmBypass, on battery mode, battery ...