Maximum capacity: 500VA (300W) and 1,000VA (600W) Rated capacity: 600VA (360W) and 1,200VA (720W) Input commercial power range: 145 to 280V AC AVR range: 165 to 270V AC Frequency: 50Hz ±10% Output: commercial power sine-wave Inversion: simulated sine-wave Frequency commercial power supply: shared frequency with the commercial inversion State: 50Hz ±0.5 AVR voltage range: 220V AC ±10% (auto-sensing) Transfer time typical: 5ms (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 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 one second when the input is cut off Overload continuously beeping sound when overload Battery type sealed, maintenance-free lead acid Capacity: (12V, 7Ah) x 1 (12V, 7Ah) x 2 Recharge time: 8 hours, 90% of full capacity Back-up time: typical 20 minimum (half load) Battery protection: automatic self-test, discharge protection Communication interface: RS232 (port) (B) bidirectional communication port Appearance: Net weight: 5.8 to 12kg Gross weight: 6.1 to 12.5kg Size: 260 x 97 x 135, 375 x 130 x 190mm Outside packing weight: 19 to 28.5kg Quantity: 32 Size: 455 x 366 x 228, 495 x 460 x 315mm Remark communication port (K-500VA/600VA/800VA/1,000VA/1,200VA) We accept order with special specifications