Capacity(VA/Watts): 850 / 510   INPUT - Nominal Input Voltage: 110/120Vac or 220/230/240 Vac - Operating Voltage Range: 81-145Vac/162-290 Vac - Operating Frequency Range: 50/60 Hz (±10%)   OUTPUT - Output Voltage range (Batt. Mode): Simulated Sinewave at nominal voltage ±10% - Frequency Range (Batt. Mode): 50 Hz or 60 Hz ± 1 Hz - Transfer Time: Typical 2-6 ms   BATTERY - Battery Type & Number: 12 V / 9 Ah x 1 - Typical Recharge time: 6-8 hours ( To 90% capacity)   PROTECTION - Full Protection: Overload and overcharge protection   INDICATORS - Indicators: AC Mode Battery Mode Load Level Battery Level   ALARM - Battery Mode: Sounding every 10 seconds - Battery Low: Sounding every second - Overload: Sounding every 0.5 second - Battery Replacement Alarm: Sounding every 2 seconds - Fault: Continuously sounding - Management: USB port Supports Windows® 2000/2003/XP/Vista/2008 Windows® 7   ENVIRONMENT - Operating Temperature: 0- 40°C - Humidity Range: 0-95 % (Non-condensing) - Noise Level: <40dB (1 meter from surface)   PHYSICAL - Dimension D x W x H (mm): 298*101*142 - Net Weight (kg): 4.9   STANDARDS - Safety: IEC/EN62040-1;IEC/EN60950-1 - EMC: IEC/EN62040-2;IEC61000-4-2;IEC61000-4-3;IEC61000-4-4;IEC61000-4-5;IEC61000-4-6;IEC61000-4-8