APC Back-UPS ES, 390 Watts / 650 VA,Input 120V / Output 120V UPS System (Discontinued by Manufacturer) Output Power Capacity: 390 Watts / 650 VA Nominal Output Voltage: 120 V Output Connections: 4x NEMA 5-15R (Battery Backup) & 4x NEMA 5-15R (Surge Protection) Nominal Input Voltage: 120 V Input Frequency: 50/60 Hz Input Connections: NEMA 5-15P Battery Type: Maintenance-free sealed Lead-Acid battery with suspended electrolyte - leakproof Control panel: LED status display with On Line - On Battery - Replace Battery and Building Wiring Fault Audible Alarm: Alarm when on battery - distinctive low battery alarm - overload continuous tone alarm