Input Voltage Range: 88Vac - 139Vac Input Frequency: 60Hz ±3Hz Automatic Voltage Regulation: Yes, +14% Output Frequency: 60Hz ±1% Surge Suppression: 1470 Joules LCD: Internal Circuitry Limiting Alarm: On Battery, Low Battery, Overload Battery Size: 12V / 9Ah Replacement Battery Quantity: 1 Replacement Battery Model: RB1290X2C GreenPower UPS™ Bypass Dataline Protection RJ-45 / RJ-11 Emergency Power OFF Yes Protection Type Over Loading Plug/Connector Type NEMA 5-20P Receptacle Type NEMA 5-20R / NEMA 5-15R EMI/RFI Noise Filter Yes Transfer Time 4 ms Receptacle Detail 2 x NEMA 5-20R / 6 x NEMA 5-15R