USB bluetooth adapter for PC added BT capability to an older computer or replaces a failed BT cardBluetooth audio adapter connects to a BT speaker headset keyboard mouse and more; Pair up to 7 devices when supported by the computer hostSimple installation with Windows drivers on the included CD or available for download; Drivers automatically install with Windows 8.1 and 10; CD includes additional BT profiles not included in WindowsLow-energy bluetooth 4.0 will not quickly drain power from the connected BT adapter (in Windows 8.1 and 10); Backwards compatible with BT 1.0 2.0 and 2.1W indows compatible with XP Vista 7 8.1 10; Plug & play with Raspberry Pi Zero and 2 with Raspbian