Lenovo ThinkPad X300 Series User Manual page 21

Using wireless LAN connections
Your computer comes with a built-in wireless networking card and a configuration utility to help you make wireless connections and monitor the status of your
connection, so that you can stay connected to your network while you are in the office, in a meeting room, or at home, with no need for a wired connection.
Attention: If you carry your ThinkPad computer with the wireless LAN feature into an airplane, you need to disable it before boarding. To disable it, refer to the
instructions in Enabling or disabling the wireless
Note: You can purchase a wireless networking card as an option. For more information, refer to
Tips for using the wireless LAN feature
Place your computer so that there are as few obstacles as possible between the wireless LAN access point and the computer.
For the best connection of the wireless LAN feature, open your computer display to an angle of slightly more than 90 degrees.
If you use the wireless feature (the IEEE 802.11 standard) of your computer simultaneously with a Bluetooth option, data transmission speed can be
delayed and the performance of the wireless feature can be degraded.
Wireless networking setup
Wireless security features
feature.
Finding ThinkPad options.