Lenovo ThinkPad X1 Extreme Gen 4 User Manual page 64

The following illustration shows the antenna locations on your computer:
1 Wireless LAN antenna (auxiliary)
2 Wireless LAN antenna (main)
3 Wireless WAN antenna (MIMO1)*
4 Wireless WAN antenna (main, for selected models)
5 Wireless WAN antenna (auxiliary, for selected models)
6 Wireless WAN antenna (MIMO2)*
*for selected models
Operating environment
Maximum altitude (without pressurization)
3048 m (10 000 ft)
Temperature
• Operating: 5°C to 35°C (41°F to 95°F)
• Storage and transportation in original shipping packaging: -20°C to 60°C (-4°F to 140°F)
• Storage without packaging: 5°C to 43°C (41°F to 109°F)
Note: When you charge the battery, its temperature must be no lower than 10°C (50°F).
Relative humidity
• Operating: 8% to 95% at wet-bulb temperature 23°C (73°F)
• Storage and transportation: 5% to 95% at wet-bulb temperature 27°C (81°F)
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ThinkPad X1 Extreme Gen 4 / P1 Gen 4 User Guide