Free drive version, with the recommended use of the latest IVT_BlueSoleil_6.2.227.10 - Bluetooth V2.0; -USB2.0 Specification, backward compatible with USB1.1 / 1.2; -USB Bus powered, no additional p more→ower supply built-in LED work lights indicate; - Thin very light, built-in antenna, no USB connection, use, easy to carry; - Frequency: 2.400-2.4835Ghz; - Spread 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 vista; - Support EDR safe mode; - Wireless transfer files, video, wireless printing wireless networking and other functions; -