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Electrical and environmental requirements
Meets ENERGY STAR requirements
Line voltage: 100-240V AC
Frequency: 50Hz to 60Hz, single phase
Maximum continuous power: 180W (17- and 20-inch models); 220W (24-inch model)
Operating temperature: 50° to 95° F (10° to 35° C)
Storage temperature: -40° to 185° F (-40° to 85° C)
Relative humidity: 5% to 95% noncondensing
Maximum altitude: 10,000 feet[/left]
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http://www.apple.com/imac/specs.html
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