APC BK350EI. Output power capacity (VA): 350 VA, Output power: 210 W, Power supply input frequency: 50 - 60 (±3). Battery technology: Sealed Lead Acid (VRLA), Typical backup time at half load: 18.1 min, Typical backup time at full load: 4.7 min. Colour of product: Beige. Weight: 6.32 kg. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -15 - 45 °C, Operating relative humidity range: 0 - 95 %