Tripp Lite SMART1500XL Smart Pro 1500 VA 980 Watts Tower 8 Outlets Extended Runtime Line Interactive UPS Outlets: 6 Battery Run Time: Full load runtime 7 minutes (1500 VA) Half load runtime 20 minutes (750 VA) Battery Recharge Time: 2-4 hours to 90% Output Voltage: LINE MODE: Sine wave line voltage 120V (-18% / +8%) BATTERY MODE: PWM sine wave output 115V +/-5% Outlet Type: NEMA 5-15R Alarms: 3 function audible alarm indicates power failure conditions (4 short beeps every 10 seconds), overload (continuous short beeps) and low battery (continuous tone) Interface Port: RS-232, USB Approvals: UL1778 (USA), cUL (Canada), FCC Class A (emissions), NOM (Mexico)