Voltage:110 / 120VAC or 220 / 230 / 240VAC; AC Voltage Regulation (Batt. Mode):± 5%; Frequency Range (Batt. Mode):60Hz or 50Hz ± 1Hz; Transfer Time:6ms typical, 10ms max; Waveform (Batt. Mode):Simulated Sinewave
Alarms
Battery Mode:Beeps every 10 seconds; Low Battery:Beeps every second; Overload:Beeps every 0.5 seconds; Faul:Continuously beeping