UPS-BESTONE-1200VA 1200VA-720W Input: Voltage: 100V / 110V / 120V: 80 ~ 150Vac 220V Frequency: 50 / 60Hz ± 10% (auto-sense) Output: Voltage: 100V / 110V / 120Vac ± 10% or 220V / 230V / 240Vac ± 10% Frequency: 50 / 60Hz ± 1% (auto-sense) Waveform: Mains mode: pure sine wave ; battery mode: simulated sine wave Crest factor: 3:1 Transfer time: Typical 2 ~ 7 ms; Max.10 ms