APC Symmetra LX 4kVA Scalable to 8kVA N+1 (SYA4K8I) - Capacity: Output Voltages 220, 240, Output 5.6kWatts / 8.0kVA, Output Frequency (sync to mains) 47 - 63 Hz, Input Voltages 220, 240, 380, 415, Input Frequency 45 - 65 Hz Auto-sensing, Battery Type: Lead-Acid Battery, Included Battery Modules x 1, Connectivity: DB-9 RS-232, Smart-Slot, Emergency Power Off (EPO), Waveform type: Sine Wave