This is a Bluetooth adapter designed for long-distance communication. It has been used very little. All accessories included (instruction manual, CD-ROM with drivers, etc.) Manufacturer: Sena Technologies Product Name: Parani-UD100-G03 Standard: Bluetooth+EDR 4.0 Class 1 Communication Range: 300m (depending on the Bluetooth standard of the communicating device) Supported OS: Windows XP/Vista/7/8/10 (32/64bit) * Uses the Bluetooth stack driver for Windows OS, and the Mac OSX Bluetooth stack driver for Mac OSX. Reference URL: https://intersolutionmarketing.jp/products/parani_ud100.html - Removing the standard antenna reveals a coaxial cable terminal, allowing for even longer-distance communication by replacing it with an external antenna. - It doesn't seem to work immediately upon connection, and requires setup of dedicated Bluetooth software rather than using the Windows standard function. - This is a specialized product, so it's recommended to gather information beforehand.