Servokon systems offers offline power backup. These power conditioning equipments cater to specific needs of the industries and power consumers. Servokon products have applications in large and small computer installations, call centres, industrial automation, banks, airlines, healthcare, r&d establishments, dot other scientific and critical centres, etc. These products come with unconditional guarantee, reliability and user friendliness. General specifications: rating - 500 va; input - mains or 12 v dc; output - 220 v ac ±10% [under line mode], 220 v ac ±3% [under battery mode]; frequency - same as input [under mains mode], 50 hz ±0.5% [under battery mode]; built in battery smf - 1 x12 v [7ah]; max charging voltage - 13.8 v; 90% recharge time - 3 to 4 hours; efficiency - ac to dc >95%, dc to ac>85%; acoustic noise level - <40 db at one meter; smartport - signal type-db-9 female [optional]; protection - no lead short circuit overload low battery; indications - 500 va to 1 kva ups, mains on output on inverter on battery low/overload; environment - temperature humidity.