Input Voltage Range: Input voltage range for main operations: 82 - 144V Input voltage adjustable range for mains operation: 75 - 154V Input Frequency: 50/60 Hz +/- 3 Hz (auto sensing) Output Voltage: 120V Battery Recharge Time: 3 hour Alarms: Alarm when on battery : distinctive low battery alarm : overload continuous tone alarm Interface Port: USB Approvals: CSA,FCC Part 15 Class A,UL 1778 Surge Energy Rating: 459 joules