NGS ALERT500. Output power capacity (VA): 500 VA, Output power: 300 W, Power supply input frequency: 50/60 Hz. Battery recharge time: 6 h, Typical backup time at full load: 10 min. Weight: 3700 g. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 0 - 85 %. Safety: CE