Features: 1.Broadcom 2045 chipset with legal bluetooth address code 2.Support Bluetooth V2.0 3.Supply legal Widcomm bluetooth software 4.Lower power consumption 5.Supports A2DP (Advance Audio Distribution Profile) for high quality stereo 6.Multiple connections - connect two or more Bluetooth devices at the same time 7.AFH (Adaptive Frequency Hopping) increases connection stability for further improved error correction performance 8.Full compatibility with USB equipped computers, supporting both USB 1.1 & 2.0 standards 9.Tested compatibility with Bluetooth enabled mobile phones, PDAs, headsets and other Bluetooth devices 10.Backwards-compatible with older Bluetooth devices (versions 1.1 & 1.2) 11.Rang: 0-10m 12.Less interference with Wi-Fi networks 13.Security:128 bits security code 14.Support Windows 98/98SE/ME/2000 OS 15. Support Windows Vista OS