Lenovo H30-50 Safety and Warranty guide - Page 22
Adaptability index for product operation environment, 90V - 264V, 50/60Hz - desktop
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Set the monitor and screen to be on the even level with or slightly lower level than your line of sight Adjust the elevation of the monitor to a comfort angle of view Keep your wrists in a comfort and relaxed position Keep your forearms on the even level with the desktop Keep your feet on the floor steadily 1. To avoid unexpected failure, pay attention to ensure the computer to operate within the scope of environmental specifications and: Adaptability index for product operation environment Adaptability for power supply 220V ± 22V, 50Hz ± 1Hz (Only For China Desktop) 90V - 264V, 50/60Hz (Adaptive Voltage Positioning) 90V - 264V, 50Hz ± 1Hz (With Voltage-selection Switch) Operating temperature 10˚C - 35˚C Relative operation humidity 35% - 80% Storage & transportation temperature -40˚C - 55˚C -20˚C - 55˚C (AIO) Relative humidity for storage & transportation 20% - 93% (40˚C) Atmosphere pressure 86 kPa - 106 kPa Warning It will cause irremovable failure when the computer is powered on immediately after it is moved from the environment with low temperature to the operating temperature, so make sure your computer to restore for more than 2 hrs under the operating temperature. Safety and warranty guide 17