**********USB BLUETOOTH ADAPTER for PC added BT capability to an older computer or replaces a failed BT card*****BLUETOOTH AUDIO ADAPTER connects to a BT speaker, headset, keyboard, mouse and more; Pair up to 7 devices when supported by the computer host*****SIMPLE 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 Windows*****LOW-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 2.1 *****WINDOWS COMPATIBLE with XP, Vista, 7, 8.1 10; Plug & Play with Raspberry Pi Zero and 2 with Raspbian