Avr( automatic voltage regulator) emergency backup power surge & spike protection. cold start functions smart battery management. 2 power outlets. main features .frequently 50Hz or 60Hz .Wide input range , with built-in AVR .Line surge protection .Low battery Alarms and shutdown protection .short circuit protection .cold start function offline charging function capacity:1000va materials:plastic input voltage:110/120/vac or VAC voltage range: 86-230VAC or 140 -285 Vac frequency range 60/50Hz(Auto sen sing) output voltage 110/120 VAC or VAC AC voltage regulation (bat mode) +-10% frequency range (bat mode) 60h zor 50hz +_ 1hz transfer time typical 2-6ms waveform (bat mode) simulated sinewave power factor 0.6 battery battery type & number 12v,7ah x1 floating charging