Amazon.com: Lenovo ThinkPad X240 12.5in Business Ultrabook Laptop Computer, Intel Core i7-4600U up to 3.3GHz, 8GB RAM, 128GB SSD, Bluetooth 4.0, USB 3.0, Windows 10 Pro (Renewed) : Electronics
Lenovo ThinkPad X240 Review: Lenovo's ThinkPad X240 is a very different beast compared to the X230, but still one of the best small laptops on the market - Notebooks - Ultraportable -
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IBM Lenovo Thinkpad T540 W540 W541 X240 X240s Intel Wireless N Bluetooth 4 Card | eBay
SOLVED: Is it possible to add Bluetooth from another laptop to this one - Lenovo Thinkpad X240 - iFixit
Amazon.com: Lenovo ThinkPad X240 12.5in Business Ultrabook Laptop Computer, Intel Core i7-4600U up to 3.3GHz, 8GB RAM, 128GB SSD, Bluetooth 4.0, USB 3.0, Windows 10 Pro (Renewed) : Electronics