... input range overload, short circuit protection Modified Sine 1200VA Offline backup UPS, AVR function, high performance transformer and MOSFET, ... time< 8msWaveformSquare waveProtection typeBattery low, Overload, short circuitalarm and LED displayAlarm every 4-second if powered by battery with red ... *195*275Loading Quantity (1*20' container21002100210011001100 New 1200VA backup offline UPS LED display