Start using Bluetooth - Adds Bluetooth to your Windows 11, 10, 8, and 7 PC that doesn't already have it. Connect your Devices - Supports wireless Bluetooth headphones, speakers, headsets, keyboards, mice, phones, and more! Tiny Design - This mini USB dongle can stay plugged in while you are on the move. This adapter is intended only for computers that do not already have built-in Bluetooth. Compatibility - Not usable in car stereos, TVs, or Mac computers. Not recommended for employer-provided computers. Does not add Bluetooth 4.0 support to Windows 7. Special drivers (provided) are needed in Windows 7 for Bose QC35 and some other recent devices