IEEE 802.11b, IEEE 802.11a, IEEE 802.11g, Wi-Fi CERTIFIED, IEEE 802.11n, Bluetooth 4.0, IEEE 802.11ac. We will make every attempt possible to resolve the issue if we made a mistake. Microsoft surface pro 4 256gb, wi-fi, 12.3in silver (intel core i5 8 gb ram) 7ax-00006, 7ax-00011, cr3-00001, tj2-00004, u5n-00001, u5n-00006, wx3-00001.