Little Doctor series off-line UPS Features: *Advanced PWM technology for inverter output *Automatic voltage regulation (AVR) design for extremely wide voltage input range... *RJ45/11 jacks with built-in all time surge suppression device(Power-500B, Power-1000CB). * Intelligent communication port for automatic file saving and computer shutdown(Power-500B, Power-1000CB) * Self-protection against abnormalities such as overload and short circuit. * Intelligent battery management function thanks to the float charging technology which provides protections against over charge and low battery voltage. Longer battery life is guaranteed... Specification: Model Power-500A/B Power-1000CA/B Max capacity(VA) 600VA(300W) 1200VA(600W) Rated capacity 425VA(200W) 800VA(400W) Input Commerical power range 165VAC-280VAC AVR range 145VAC-285VAC Frequency 50Hz+/-10% Output Commerical power Sine-wave Inversion Simulated sine-wave Frequency Commercial power supply: Shared frequency with the commercial inversion state: 50Hz+/-0. 5 AVR voltage range 220VAC+/-10%(Auto-sensing) Transfer time Typical: 10ms(Including detection time) Protection Overload UPS automatically shutdown if overload exceeds 150% of normal value for 30 seconds and 180% for 3 seconds TEL/FAX/MODEM RJ45/11 JACKS(Compatible with UPS-500B Power-600CB Power-1000CB) Short circuit UPS Output is cut off immediately or input circuit breaker protection Alarm Battery back-up Beeping sound every 4 seconds when the input is cut off Battery low voltage Beeping sound every 1 seconds when the input is cut off Overload Continuously beeping sound when overload Battery Type Sealed, maintenance-free lead acid Capacity (12V, 7AH)X1 (12V, 7AH)X2 Recharge time 8 Hours to 90% of full capacity Back-up time Typical 10 min(Halfload) Battery protection Automatic self-test, discharge protection Communication interface RS232(port)(B) Bi-directional communication port(Compatible with UPS-500B Power-600CB Power-1000CB) Appearance Net weight 5. 8kg 12kg Gross weight 6. 1kg 12. 5kg Size(mm)DxWxH 260x97x135 375x130x190 Outside Packing Weight 19kg 28. 5kg Quantity 3 2 Size(mm)DxWxH 455x366x228 495x460x315 Remark Communication port(UPS-500B Power-600CB Power-1000CB)