BEST ONE Backup 650VA

UPS Specifications
Input     Voltage: 160–275 V
              Frequency: 50 Hz or 60 Hz ±6%
Output  Voltage: 220 VAC (±5%, adjustable)
              Frequency: 50 Hz or 60 Hz ±1%
              Waveform: Square wave
              Voltage regulation: 10%
              Transfer time: Less than 10 ms (10 ms during system check)
              Rear sockets: 3 IEC sockets — 2 battery-backup sockets and 1 printer-surge         
Battery   Type: Sealed lead-acid, maintenance-free
               Backup time: 20–40 minutes, depending on the load conditoin 
               Recharge time: 8 hours to reach 90% capacity
Protection
               Over-voltage : AC input >25%
               Under-voltage : AC input <25%
               EMI/RFI: EN50081-1 and FCC Part 15 Class A
               Surge : IEEE 587 Category A, varistor clamping, 480 joules at 10–12 seconds
               Overload protection: Fuse and current limiting
               Short-circuit protection: Fuse, current limiting, and cutoff
               Low-battery cutoff: Two-stage protection during battery drain and after cutoff
Audible Alarms

               Battery discharge: Beeps every 4 seconds after mains fail
               Final battery discharge: Beeps once every second as the battery approaches the                 low-battery stage
               Overload/short circuit: Continuously

Environment
               temperature: 0–40°C (32–104°F)
               Relative humidity: 0–90%, non-condensing
Physical Specifications
               Acoustic noise: Less than 50 dB at 1 meter
               Outlet: IEC 320
Weight:   6.5 kg
Dimensions: 32.5 × 13.9 × 21.0 cm