Output Voltage BATTERY MODE PWM sine wave output 115V /5% Outlets 6 Outlet Type 515R output receptacles 3 UPS supported 3 surgeonly Battery Run Time Full load runtime 3 minutes 180 watts Half load runtime 11 minutes 90 watts Alarms Audible alarms for ON BATTERY LOW BATTERY and OVERLOAD status Interface Port USB Data Line Protection Single line TEL/DSL Surge Energy Rating 420 joules