 
| MODEL | BK850 | 
| Capacity | 850VA/480W | 
| INPUT | |
| Voltage | 110/120 VAC or 220/230/240 VAC | 
| Voltage Range | 81-145 VAC or 162-290 VAC | 
| Frequency Range | 60/50Hz (Auto sensing) | 
| OUTPUT | |
| Voltage | 110/120 VAC or 220/230/240 VAC | 
| AC Voltage Regulation(Bat Mode) | ±10% | 
| Frequency Range(Bat Mode) | 60Hz or 50Hz ± 1Hz | 
| Transfer Time | Typical 2-6ms | 
| Waveform(Bat Mode) | Simulated sine wave | 
| Peak Efficiency(AC Mode) | >95%@ Full R load | 
| BATTERY | |
| Battery Type & Number | 12V 9Ah*1 | 
| Floating Charging Voltage | 13.7VDC | 
| Charging Ability | 4-6 hours recover to 90%capacity | 
| PROTECTION | |
| Full Protection | Short circuit, Overload,Battery discharge and overcharge,Surge protection | 
| INDICATIONS | |
| Line Mode | Green lighting | 
| Battery Mode | Yellow flashing | 
| Fault | Red lighting | 
| ALARM | |
| Battery Mode | Sounding every 10 seconds | 
| Low Battery | Sounding every second | 
| Overload | Sounding every 0.5 seconds | 
| Battery Replacement Alarm | Sounding every 2 seconds | 
| Fault | Continuously sounding | 
| COMMUNICATIONS | |
| USB/RS232/SNMP(options) | Supports Windows 2000/2003/XP/Vista/2008, Windows 7/8 Linux Unix and MAC | 
| ENVIRONMENT | |
| Humidity | 0-90% Relative Humidity 0-40°C (Non-Condensing) | 
| Noise Level | Less than 40dB | 
| Dimension | 297*101*142mm | 
| Net Weight | 4.9KG |