ICIDU Bluetooth Adapter Class II. Connectivity technology: Wireless, Host interface: USB, Interface: Bluetooth 1.1/2.0. Data transfer rate (max): 1 Mbit/s. Maximum operating distance: 20 m. Packaging width: 125 mm, Packaging height: 154 mm. Compatible operating systems: Microsoft Windows 98, Microsoft Windows 2000 / XP / Vista, Packaging length: 22 mm