Though technically Bluetooth 4.0, many dongles marketed as 5.0 are "upgraded" CSR chips.
: The standard CSR Harmony stack or a specific CSR Bluetooth Driver for Windows 7 from reputable manufacturers usually works .
A Bluetooth USB dongle is a small device that plugs into a USB port on your computer, allowing you to add Bluetooth connectivity to your system. This is especially useful if your computer doesn't have built-in Bluetooth or if you want to upgrade your existing Bluetooth capabilities.