Features: 1.Chipset RTL8723BU for Realtek high?quality chip, 4.0 long?distance function + 2.4G WIFI function. 2.Built?in dual antenna strong signal, the latest standard IEEE802.11 a/b/g/n general network. 3.USB 2.0 interface, also compatible with USB 3.0 / USB 1.1, frequency 2.4GHz WIFI. 4.Transmission speed 2.4G up to 150Mbps, support one?key connection to the network and Soft AP mode. 5.Compatible with multiple operating systems, suitable for Windows and for Linux systems. specification:Condition: 100% Brand New Item Type: Wireless Network Card Model: W87 Supported Standards and Protocols: IEEE 802.11n, IEEE 802.11g, IEEE 802.11b, CSMACA with ACK Interface Type: USB Interface Frequency Range: 2.4~ 2.4835GHz Working Channel: 1-14 Modulation Method: 802.11 G/N: OFDM 802.11b: CCK(11, 5.5Mbps), QPSK(2Mbps), BPSK(1Mbps) Transmission Rate: 802.11b: 11,5.5,2,1 Mbps 802.11g: 54,48,36,24,18,12,9,6 Mbps 802011n: up_ to_ 150Mbps. Receiving Sensitivity: 130M: -65dBm10% PER;-108M: -65dBm10% PER; 54M: -65dBm10% PER; 11M Transmission Distance: Indoor up to 15 meters, outdoor up to 100 meters (varies depending on the environment) RF Power: 16dBm (maximum) Antenna Gain: Built-in antenna 1-5Dbi Support System: For Windows XP, for VIsta, for WIN 7, for Linux above Win8, for OS Use Environment: Working temperature: -20 to 45 Storage Temperature: -40C to 70C Working Humidity: 10% to 90%RH non-condensing Storage Humidity: 5% to 90%RH non-condensing Other Technical Parameters: Provide two working modes: centralized control (infrastructure) and peer-to-peer (Ad-Hoc) PackageList:1 x Wireless Network Card1 x Instruction Card1 x Optical Disc