A/Soft start technology, B/Automatic Reset -Restarts automatically if the inverter shuts down from:Over-voltage, under-voltage, overload, short circuit, or over temperature, after the problem is corrected. Previously, manual reset was required. Continuous power 2000W Surge capability 4000W Input voltage 12/24V Output voltage 100V/110V/230V/240V Frequency 50HZ/60HZ Output waveform modified sine wave Efficiency >90% Static current 0.6A Low input voltage protection Low input voltage warning Output overloading protection With cooling fan High tempreture protection Short curcuit protection Reverse polarity protection