This 100/120/127V 50/60 Hz on-line double-conversion UPS system maintains perfect output by converting AC input to DC, then reconverting UPS output to fully regulated sine wave AC with +/-3% voltage regulation in on-line and battery modes. Featuring 1440 W capacity, 540 joules of surge suppression, true on-line operation with pure sine wave output, unity (1.0) power factor, and zero transfer time between on-line and battery modes, the SmartOnline SU1500LCD1U provides the highest level of AC power protection and battery backup for network equipment in your small- to medium-size data center or computer room.