| Model | D500(425VA) D1000(625VA) | 
| lnput line | Single-phase | 
| lnput voltage | 95-145V/175-265V | 
| lnput frequency | 57-63Hz/47-53Hz | 
| lnverting output waveform | Square wave | 
| Control mode | PWM | 
| lnverting output voltage  precision | 120V/220V±10% | 
| lnverting output frequency | 50Hz/60Hz±0.5% | 
| Output load capacity | 425VA:625VA | 
| Transition time | <10ms | 
| Battery type | Maintenance-free lead acid battery 12VDC | 
| Time of supplying power | 4-20min | 
| Charge time | Charge 90%in 7-10hrs | 
| Service environment | Charge 90% in 7~10hrs | 
| Protection function | Temperature: 0~40 , relative humidity: 95%(no condensation) | 
| Sound alarm | Communication port protection against under voltage of input terminal, surge voltage and battery under voltage | 
| Computer interface to  computer | When commercial power is off or too low, it will sound for once every 4s; when the battery is undervoltage, it will sound for once every 1s; when the fault shows or battery is used up, it will soundcontinuously. 
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| Environment | Temperature: 0~40 , relative humidity:95%(no condensation) | 
| NW(kg) | 3.75 (425VA) 4.25 (625VA) | 
| Outline size(mm) | 365× 315× 75(The outline size of 425VA and 625VA is the same. ) |