... after ten seconds to conserve battery power when no power needs are detected. h).Battery level indicatorsLED ... dischargeBypassAutomatic transferOn overload and UPS failureBefore UPS power-onDefault “NO”, user adjustable to “YES”Voltage range80~264VAC(default ... , utility power, inverter, bypass, overload, faultAudible alarmBypass, on battery mode, battery low, overload, faultAcoustic noiseAt 1 meter ...