HIGH EFFICIENCY. ADVANCED DIGITAL CONTROL BY MICROPROCESSOR WITH USER FRIENDLY INTERFACE. ON / OFF SWITCH. 100 / 110 / 115 / 120 VAC SELECTABLE. 50Hz OR 60Hz OUTPUT FREQUENCY SELECTABLE. THERMOSTATICALLY CONTROLLED COOLING FAN. REMOTE PORT. TRI COLOR LED STATUS INDICATOR. OVER TEMPERATURE PROTECTION. SHORT CIRCUIT PROTECTION. OVERLOAD PROTECTION. LOW BATTERY ALARM. LOW BATTERY SHUTDOWN. BATTERY POLARITY PROTECTION. OVER VOLTAGE PROTECTION. UNDER VOLTAGE PROTECTION. NO LOAD CURRENT DRAW: <6W @ STANDBY SAVING MODE. OFF MODE CURRENT DRAW: <1mA. COMPLIANCE TO UL458 / FCC / E 13 / CE. UL LISTED. DIMENSIONS: 16 X 7.25 X 3 INCHES. WEIGHT 8 LBS. 3 YEAR WARRANTY.