Lenovo ThinkPad T400s series User Manual page 11

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Location of the FCC ID and IC Certification number label (T400s)

There is no FCC ID or IC Certification number for the PCI Express Mini Card shown on the enclosure of your computer. The FCC ID and IC

Certification number label is affixed on the card installed in the Mini PCI Express Card slot of your ThinkPad computer.

If no integrated wireless PCI Express Mini Card has been preinstalled in your computer, you can install one. To do this, follow the procedure in

Installing and replacing the PCI Express Mini Card for wireless LAN/WiMAX connection

Installing and replacing the PCI Express Mini Card

for wireless WAN

connection.