Haihood Mini USB Bluetooth Dongle Adapter for Laptop PC Win Xp Win7 8 iPhone Bluetooth V2.0 + EDR;USB2.0 specification, backward compatible with USB1.1/1.2;USB bus powered, no power supply is built-in LED work light indication Slim extremely light, built-in antenna, no USB connection, use, easy to carry;Frequency :2.400-2 .4835 Ghz;Usage Frequency: frequency hopping Spread spectrum (FHSS);Transfer Rate: 3Mbit / s (EDR), transmission speed more quickly;Security: 128 bits safe mode;Supports all Windows systems, including Windows, xp, vista, win7 win 8, etc;Support EDR security mode Wireless transmission of documents, audio, video, wireless networking features such as wireless printing;Wireless connected devices (such as computer / PDA / mobile phones / printers / wireless game controller) with Bluetooth technology Support VOIP voice calls seamlessly connect Skype software.;Bluetooth specification V 2.0 & V 1.2 Compliant;Supporting profiles : networking, Dial-up, Fax, LAN access , and Headset;Plug and Play, no driver;Length with only 1.9cm;Working with led lights;Weight: Approx 9g;Easy and Convenient to use