Tripp Lite SMART1200XLHG Smart Pro 1000 VA 750 Watts Hospital Medical Grade Line Interactive UPS Outlets: 4 Battery Run Time: Full load runtime 10 min. (1000VA) Half load runtime 28 min. (500VA) Battery Recharge Time: 2-4 hours to 90% Series: SmartPro XL Input Voltage Range: 120V Output Voltage: LINE MODE: Sine wave line voltage 120V (-18% / +8%) BATTERY MODE: PWM sine wave output 115V +/-5% Outlet Type: NEMA 5-15R-HG Hospital-Grade Alarms: 3 function audible alarm indicates power failure conditions (4 short beeps every 10 seconds), overload (continuous short beeps) and low battery (continuous tone)