... 600VA, UPS-1000VA, and UPS-1500VA 1, Off-line UPS:UPS-500VA, UPS-600VA, UPS-1000VA, and ... Input voltage: 220V±20%Output voltage: 220V±10% Supply time: rating power 80% (3-4M), rating power 50 ... % (8-10M) Frequency: 50Hz Transform time: ≤10ms Efficiency: ≥80% Output waveform: square wave Ambient ... temperature: 0-40°CNoise: ≤50dB Charging time: 8 hours reach 90% UPS,off line type