- Upgrades Bluetooth® support for Windows® XP and later, or Linux PCs and Raspberry Pi. - Extremely compact USB adapter. Safe to leave in for laptop travel. - Supports Bluetooth keyboards, mice, headsets, and more (with Microsoft® built-in stack). - Supports Bluetooth stereo headsets and more (WIDCOMM® stack only, install required). - Specifically works with Microsoft’s new Bluetooth 4.0 Low Energy support in Windows 8®. - Support built-in to Linux kernels 3.0.34 and higher (for profiles supported by Linux).