USB 2.0 Mini Bluetooth 4.0 CSR4.0 Adapter Dongle for PC LAPTOP WIN XP VISTA 7 8 Bluetooth Standards: Bluetooth 4.0 Transfer rate: Up to 3.0Mbps Chipset: CSR8510 Antenna: Integrated Antenna Compatible with most Operating system: Windows 98, 98 SE , ME, 2000, XP, Vista Win 7/8 32/64 bit