|  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.
  | 
|  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. ) |