Mini PCIE Wireless Wifi Card DualBand BT 4.0 Network Module for Intel 7260 ac Dell 7260HMW Item Type: Mini PCI-E Interface: Standard half height mini pci-e interface card Support: USB (Bluetooth) and mini pci-e type (wifi) Wireless Network Card Support: 802.11 ac standard, compatible with other 802.11 protocols Model: 7260hmw Compatible Ports/Slots: Mini pci express Transmission Speed: 876mbps Frequency Band: 2.4 ghz/5 ghz Bluetooth: V 4.0 Wifi: 802.11 a/b/g/n/ac Support: For Windows 8 (32/64 bit) / windows 7 (32/64 bit) / linux 2.4.x/2.6.x or higherHow e:  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)