Offline UPS...
 
Features
 
  Surge suppressor
  Cold start on Battery
  Overload protection
  Battery drain protection
  Offline charging
  Modem and data line protection**
   
Specifications
 
Model : 500 VA- 12 V/600VA- 12 V/750 VA-24V/1 KVA-24V
Input Voltage Range                    : 145V-280V
Output Voltage on Mains            : 230 V ± 10%
Output Voltage on Battery          :  230 V ± 6%
Output Power Factor                     : 0.6/0.7*
Output Wave From (mains)         : Pure Sine Wave
Output Wave From (battery)       : Square wave/ Quasi Sine Wave
Output Frequency (Battery)       : 50 Hz + ±1%
Battery Type                                 : VRLA type Lead Acid Sealed Maintenance Free / Tubular / Flat Plate*
Change over time on Battery     : < 10 milliseconds
Battery Recharging Time : 4 to 5 Hrs
Audible Noise                               : < 45dB
Interface  : Intelligent RS 232 Port with Software**
*User choice **On request