Sweex Bluetooth Micro Adapter Class II USB. Connectivity technology: Wireless, Host interface: USB. Data transfer rate (max): 3 Mbit/s. Chipset: Cambridge Silicon Radio CSR BlueCore 4, Bluetooth version: 2.1+EDR, Maximum operating distance: 10 m. Bundled software: IVT Bluesoleil 5.4. Compatible operating systems: Microsoft Windows XP, Windows Vista, Windows 7