APC SC450RM1U 280W/450VA 120V 1U Rackmount UPS System The item is non-returnable Output Power Capacity: 280 Watts / 450 VA Max Configurable Power: 280 Watts / 450 VA; Nominal Output Voltage: 120V Output Voltage Distortion: Less than 5% at full load Output Frequency (sync to mains): 47 ~ 53 Hz for 50 Hz nominal, 57 ~ 63 Hz for 60 Hz nominal