Lenovo Beacon (English) Safety and Warranty guide - Page 23

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 Storage & transportation temperature 35% - 80% -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 device is powered on immediately after it is moved from the environment with low temperature to the operating temperature, so make sure your device to restore for more than 2 hrs under the operating temperature. 2. Select appropriate operating desks and seats and adjust their height to ensure your forearms are parallel with the floor while operating the keyboard and mouse, and your eyes are basically on the same level with the monitor, as well as ensure that your thighs are basically parallel with the floor and your feet can be placed on the floor steadily. Furthermore, you may also choose backrestadjustable seats to enhance your comfort. Warning Incorrect posture or keyboard used for too much may cause physical injury. 3. Avoid facing the screen for too much with the same posture. It is recommended to change your posture frequently and move your eyes away from the monitor from time to time, which will help you maintain a relax posture and reduce visual fatigue. Furthermore, take break for a moment or relax every some time (such as 1 hour) to help you eliminate your physical fatigue. 18 Safety and warranty guide