1、This N5321 04W3842 3G WWAN card is suitable for Thinkpad X230s X240 W540 2、FRU is 04W3842, the system supports for Windows 7~10 and for Linux, you can use with confidence 3、Adopt interface of NGFF M.2, which will meet your daily needs of working or entertainment 4、3G module network standard supports WCDMA, very useful and practical to use 5、WWAN card have stable structure, excellent performance and long service life Item Type: 3G Module How to Use: 1. Use a small screwdriver to open the back cover of the laptop, and find the wireless network card (the wireless network card is a square, and there are two black and white wires connected. There are two small screws to fix) 2. Unscrew the two fixed screws with a screwdriver, put them aside, and keep them 3. Remove the old wireless network card and replace it with a new one, return to the installation according to the original disassembled route, and fix it 4. Then boot up and install the driver automatically (the driver can be matched by the supplier according to the customer's computer model) Model: N5321 FRU: 04W3842 Interface: NGFF M.2 Network Standard: WCDMA Motherboard Size: M.2 3042 Driver Support: For Windows 7~10/Linux Product Compatibility: For ThinkPad S5-S540 For ThinkPad S540 For ThinkPad new version x1 For ThinkPad T431s, T440, T440p, T440s For ThinkPad T540p For ThinkPad W540 For ThinkPad X1 Carbon (machine type: 20A7, 20A8) For ThinkPad X230s, X240, X240s 1 x 3G Module