APC BE450G Back-UPS ES 8-Outlet 450VA 120V Uninterrupted Power Supply (Discontinued by Manufacturer) Output Power Capacity: 257 Watts / 450 VA Nominal Output Voltage: 120 V Waveform Type: Stepped approximation to a sinewave 4x NEMA 5-15R (Battery Backup) 4x NEMA 5-15R (Surge Protection) Output Power Capacity 257 Watts / 450 VA Nominal Output Voltage 120V Nominal Output Voltage 120V Output Frequency (sync to mains) 60 Hz Output Frequency (sync to mains) 60 Hz Stepped approximation to a sinewave Waveform Type Maintenance-free sealed Lead-Acid battery with suspended electrolyte : leakproof