For dual band WiFi reception, one network card has two frequency bands, which one you want to connect to To watch high-definition video and play online games on-demand, please use 5GHz WiFi frequency band with small signal interference and stable without dropping line, and avoid the 2 4GHz traditional network frequency band blocked by network Bluetooth technology makes it more convenient for us to connect various devices without being bound by various data lines; it can be used for multiple time connection, which is a simple and convenient method for short-distance wireless communication between two devicesInterface type: mini pci-eTransmission rate: 300MbpsThe quality of the wireless network card is guaranteed, and each source of supply has been selected by our quality inspection SpecificationsNetwork card chip: Atheros AR5B22Standard protocol: IEEE 802 1 1b//Wireless frequency band: 2 4G-5GBluetooth: 4 0Compatible system: windows 7/8/10Version note: Universal version (not compatible with BM computers)Colour: white + greenMaterial: PCBSize: 3 x 2 6cmPackage Contents:2 x wireless network cardOnly the above package content, other products are not included Note: Light and different displays may cause the color of the item in the picture a little different from the real thing The measurement allowed error is +/- 1-3cm