Power Output : 2000 VA Input Voltage : 140V~240V Ouput Voltage : 220V ±3% Phase : Single-phase Frequency : 50Hz/60Hz Response Time : within 0.5sec.~1sec. against 10% input voltage deviation Power Factor : 80% Ambient Temperature : -5°C~+40°C Ambient Humidity : Less than 90% (relative humidity) Temperature Rise : Less than 75°C (input voltage 180V, output voltage 220V and at rated load) Control System : DC Servo-motor Style : Stand-alone style Insulation Resistance : More than 3MΩ Dielectric Strength : Tested at AC 1500V for 1 min